how do mega yachts get fresh water

December 15

How Do Yachts Get Fresh Water: Do Superyachts Have Desalination?

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Do Superyachts Have Desalination?

For those who love luxury and the open sea, owning a superyacht is the ultimate dream. These floating palaces come with alla the bells and whistles of a five-star hotel, including the ability to generate fresh water through desalination. But do all superyachts have this capability? Let’s find out.

What is Desalination?

Desalination is the process of removing salt and other minerals from seawater to produce fresh drinking water. This is done through various methods such as reverse osmosis, distillation, and electrodialysis. Desalination has become increasingly popular in recent years, particularly in areas where fresh water is scarce.

Most modern superyachts are equipped with desalination systems. These systems are essential for long voyages, particularly those that take place in remote areas where fresh water is scarce. A typical superyacht desalination system can produce anywhere from 1,500 to 35,000 liters of fresh water per day, depending on the size of the yacht and the system’s capacity.

Desalination systems are also becoming more advanced and efficient. Many superyachts now use energy recovery devices that harness the pressure from the saltwater to power the system, reducing the need for external energy sources.

Why Do Superyachts Need Desalination?

Superyachts are essentially self-contained floating cities. They have everything from gourmet restaurants and swimming pools to movie theaters and spas. All of these amenities require water, and fresh water can be hard to come by in the middle of the ocean.

Having a desalination system on board means that superyachts can generate their own fresh water supply, allowing them to stay at sea for longer periods without needing to dock and refill their water tanks. This is particularly important for those who enjoy exploring remote areas or taking part in extended ocean crossings.

Desalination, Yacht Crew, Yachts, Yachts desalination

Do Superyachts Have Desalination? (Here’s What You Need To Know)

If you’re considering renting or buying a superyacht, you may be wondering if these luxurious vessels come with a desalination system.

With a desalination system, you can turn saltwater into drinkable freshwater, giving you access to a reliable, on-demand source of clean water.

In this article, we’ll discuss the purpose of desalination on superyachts, how it works, its benefits, and the cost of the various desalination systems available to you.

Read on to learn more about what you need to know about desalination on superyachts.

Table of Contents

Short Answer

Yes, many superyachts have their own onboard desalination systems.

These systems allow them to produce their own fresh drinking water while at sea.

Desalination systems can be powered by solar, electric, or diesel power and are typically integrated with other onboard systems like the plumbing and filtration systems.

Desalination is an efficient way for superyachts to provide their occupants with fresh water while cruising.

What is a Superyacht?

A superyacht is an extravagant, luxurious form of boat that is typically used for leisure activities such as vacationing and entertaining guests.

Superyachts tend to be significantly larger than regular yachts, and they are often equipped with a variety of high-end amenities and features.

For example, superyachts may feature custom-built interiors, luxurious furnishings, and a variety of onboard activities such as swimming pools, hot tubs, and even cinemas.

Superyachts are often owned by wealthy individuals, and they are often used for private charters or other special events.

They can also be rented out for extended trips, allowing people to explore the open seas in style.

What is Desalination?

Desalination is a process used to convert salt water into fresh water.

It is most commonly used when traditional freshwater sources are scarce, such as in coastal regions or when sailing in the open ocean.

The process involves forcing salt water through a membrane that removes the salt, leaving behind clean, fresh drinking water.

This water can then be used for drinking, cooking, and other activities.

Desalination systems are becoming increasingly popular on superyachts, as they allow yacht owners to travel further and stay longer without having to worry about freshwater resources.

Desalination systems on superyachts are typically powered by the main engine, making them an efficient and convenient way to create freshwater.

The process of desalination is relatively simple, but can require a significant amount of energy to operate.

The energy required to desalinate salt water depends on the type of system and the salinity of the water being processed.

Generally, the higher the salinity of the water, the more energy is required to desalinate it.

The energy used to power the desalination system can come from various sources, such as the main engine, solar panels, or a generator.

Desalination systems are a great way to ensure a steady supply of freshwater while sailing in remote or coastal areas.

Not only do they provide a convenient source of freshwater, but they are also often more cost-effective than traditional sources of freshwater.

Additionally, most modern desalination systems are designed to be energy-efficient and environmentally friendly, making them an attractive option for yacht owners.

What is the Purpose of Desalination on Superyachts?

Desalination on superyachts is a modern technology that allows for the transformation of saltwater into freshwater, allowing the yacht to remain at sea for longer periods of time with a reliable source of clean water.

This technology is especially useful for those who intend to sail in remote areas where freshwater resources are limited or nonexistent.

Using desalination technology, yacht owners can enjoy their vacation without worrying about running out of freshwater.

Desalination systems are usually powered by the boats main engine, making them an efficient and convenient way to create freshwater.

This technology is becoming increasingly popular among yacht owners, as it allows them to travel further and stay longer without having to worry about freshwater resources.

In addition, desalination systems are also a great way to conserve energy, as they require less energy to operate than traditional water purification systems.

Desalination systems can also be used to create a steady supply of drinking water for the yachts passengers, as well as for other onboard activities such as showering, cleaning, and cooking.

This makes desalination technology a highly versatile system, as it can be used for a variety of purposes.

Desalination systems are designed to be both reliable and safe, as they are equipped with advanced filtration systems that remove contaminants from the water.

This ensures that the water produced is safe and free of harmful bacteria and other contaminants.

In conclusion, desalination systems are a great way for yacht owners to enjoy their journeys without worrying about running out of freshwater.

This technology is becoming increasingly popular among those who intend to travel to remote areas, as it allows them to stay longer and travel further without having to worry about freshwater resources.

Desalination systems are also a great way to conserve energy, as they require less energy to operate than traditional water purification systems.

Additionally, these systems are reliable and safe, as they are equipped with advanced filtration systems that remove contaminants from the water.

How Does Desalination Work on Superyachts?

Desalination on superyachts is made possible by a specialized type of technology called reverse osmosis.

This technology uses a membrane to filter out salt from the seawater, leaving behind pure freshwater.

The membrane acts as a filter, allowing only water molecules to pass through, while trapping the salt and other impurities.

This process requires a large amount of pressure, which is usually supplied by the yachts main engine.

This pressure is necessary to force the seawater through the membrane, allowing for the desalination process to take place.

The result of this process is freshwater that is suitable for drinking, cooking, and bathing.

The reverse osmosis process is not only efficient and convenient, but it is also environmentally friendly.

The process produces no waste, as the salt and other impurities are trapped in the membrane and recycled back into the ocean.

Furthermore, the process uses little energy, making it a sustainable and cost-effective way to produce freshwater.

Desalination on superyachts also offers yacht owners the flexibility to travel further and stay longer.

With a desalination system, yacht owners can access freshwater resources regardless of their location.

This technology is especially useful when sailing in remote areas, where freshwater resources are scarce.

By having a desalination system on board, yacht owners can cruise for extended periods without having to worry about running out of freshwater.

Benefits of Desalination on Superyachts

The use of desalination systems on superyachts brings a number of advantages that can help make every journey more enjoyable.

First, with this technology, yacht owners can stay in remote areas for longer periods of time without having to worry about freshwater resources.

This is especially useful for those who like to explore remote locations that may be difficult to access by other means.

Additionally, desalination systems provide a reliable and efficient way to produce freshwater, which can be used for drinking, washing, and other purposes.

The systems are typically powered by the boats main engines, allowing them to be used in any location without the need for a reliable power source.

Desalination systems also help reduce the need for carrying large amounts of freshwater onboard, which can be both expensive and difficult to manage.

By using these systems, yacht owners can travel further and stay longer without having to worry about running out of freshwater.

Additionally, these systems can also reduce the amount of emissions released into the environment, as they dont require the burning of fuel in order to produce freshwater.

Finally, having access to a desalination system can be an invaluable asset during emergencies.

In the event of a major storm or other natural disaster, these systems can provide a reliable source of freshwater that can be used to help survivors.

Additionally, they can also be used to provide freshwater to vessels in distress, which can help save lives in the case of an accident or other emergency.

Types of Desalination Systems Used on Superyachts

When it comes to desalination systems used on superyachts, there are a few different types available.

The most common type is reverse osmosis, which works by using pressure to force saltwater through a membrane, separating the salt from the water.

This process produces freshwater that is safe to drink.

Another type is called thermal distillation, which uses heat to turn saltwater into steam and then condenses the steam back into freshwater.

Finally, there is the electrodialysis method, which uses electric current to separate salt from the water.

No matter the type, all desalination systems found on superyachts require a significant amount of power to run, making them an efficient and convenient way to create freshwater.

The power used to run the desalination systems can come from either the yachts main engines or from solar panels, depending on the type of system installed.

Its important to note that solar panels are a great option for those who want to reduce their reliance on the vessels main engines, as they can provide enough power to run the desalination system for extended periods of time.

Desalination systems can also come with a variety of features that make them even more efficient and convenient.

These features can include automatic shutoff valves, which stop the system from running when the water tank is full, and automated flushing systems, which remove any sediment buildup that can occur over time.

Additionally, some systems also come with filters that can remove any bacteria or other contaminants before the water is used.

Desalination systems are becoming increasingly popular among yacht owners as they allow them to travel further and stay longer without having to worry about freshwater resources.

These systems are also beneficial for those who like to explore more remote areas as they provide a reliable source of freshwater that doesnt require any extensive planning or preparation.

Overall, there are several types of desalination systems used on superyachts and each one has its own advantages and features.

From reverse osmosis to thermal distillation and electrodialysis, each of these systems provide a reliable way to turn saltwater into freshwater that can be used while sailing in remote areas.

The power used to run the desalination systems can come from either the yachts main engines or from solar panels, making them an efficient and convenient way to create freshwater.

With these systems, yacht owners can explore more remote areas without having to worry about freshwater resources, making them a great option for those who want to extend their travels.

Cost of Desalination Systems on Superyachts

The cost of installing a desalination system on a superyacht can vary widely depending on the size and complexity of the system.

The cost of a basic system is typically around $50,000$100,000, while more complex systems can range up to $500,000 or more.

Additionally, the cost of maintenance and upkeep of a desalination system should also be taken into consideration, as the cost of periodic maintenance and repairs can add up over time.

However, the cost of a desalination system should be weighed against the cost of having to purchase or transport fresh water to the yacht, as well as the cost of having to return to port to refill freshwater tanks.

For some yacht owners, the convenience and cost savings of having an onboard desalination system can be a worthwhile investment.

In addition to the initial cost of purchasing and installing a desalination system, yacht owners should also consider the potential environmental impact of using desalination technology.

Desalination systems use energy to convert seawater into freshwater, which can have a negative environmental impact if it is not done in an efficient and sustainable manner.

Yacht owners should research and consider the potential environmental impact of their desalination system to ensure that they are using the technology responsibly.

Final Thoughts

From luxury vacations to long-distance exploration, desalination systems on superyachts provide an efficient and convenient way to create freshwater for a variety of purposes.

Not only are these systems relatively inexpensive, but they also offer a number of benefits, including the ability to travel further and stay longer without having to worry about freshwater resources.

If you’re considering a trip on a superyacht, it’s important to know whether or not it has a desalination system.

Knowing this information will help you plan a successful and enjoyable journey.

James Frami

At the age of 15, he and four other friends from his neighborhood constructed their first boat. He has been sailing for almost 30 years and has a wealth of knowledge that he wants to share with others.

Freshwater Systems for Yachts

By Dudley Dawson
Updated: May 17, 2011

Freshwater Systems

As far as I know, neither Ben Franklin nor Rowland Howard were yachtsmen, but Howard spoke to a yachting issue when he paraphrased Franklin to observe that “you never miss the water till the well runs dry.” We, of course, have a water tank or two aboard rather than a well, but the point’s the same. We take a good, continuous supply of fresh water for granted aboard modern cruising yachts, and we sometimes don’t think much about the freshwater systems until we are forced to choose between taking a shower or cooking the pasta.

Freshwater systems are relatively straightforward and not too difficult to maintain if you understand a few basics. On small boats , a system can be as simple as a tank and a pump that comes on when a faucet is opened. Systems on most yachts, though, are a little more involved. They consist of one or more tanks, often with level monitors, feeding through a sediment filter to a pressure pump. The pump charges an accumulator (bladder) tank to maintain pressure without continuously running the pump. The pipe or hose from the accumulator then feeds to a manifold to supply cold water directly to the toilets, showers, tubs, lavatories, galley sinks and ice makers. It also feeds to a water heater, fitted with a temperature/ pressure relief valve for safety, to supply hot water to the showers, tubs and sinks. On larger yachts, there may be a connection to the washdown hoses and even to the firefighting system to avoid the damage that would result from spraying salt water inside the yacht in the event of a small fire.

The freshwater systems on yachts are potable; that is, both the water and the system’s components with which it comes into contact must meet the standards for drinking-water quality. In the United States, these are set by the Food and Drug Administration (FDA), so look for tanks, hoses and fittings made with FDA-approved materials, and always use such components when maintaining or repairing the system. This includes the tanks and components downstream, the tank fill and the vent lines, and make sure the vent lines terminate high enough to prevent them from submerging when the yacht rolls or takes a wave. If you’re careful about the water coming into the tank, the system should stay fairly clean, but ultraviolet sterilizers are available if you want to make sure you and your guests are as protected as possible.

Now, I have a bone to pick with current yacht design and construction practices. In my early years as a yacht designer, we put lots of freshwater tank capacity aboard, because only the largest yachts of the day could afford the space, expense and power needed for a steam distillation unit to produce fresh water under way. Then came reverse osmosis (RO) systems, also commonly known as watermakers, and eventually even the smallest yacht could afford one of the compact units to replenish the tanks. As a result, some new yachts have much smaller water tanks than their predecessors had. That, I think, is a mistake, and it came to light for me during an extended cruise on which we did a lot of gunkholing and anchoring. Because the tanks were too small to carry a sufficient supply, we had to run the generator to power the watermaker during periods in pristine anchorages where peace and quiet would have been preferable to the intrusive hum of the generator.

I’d opt for several tanks in ideal freshwater systems, filling only one for day trips, but filling them all for longer cruises, combined with a water maker large enough to recharge the tanks when running only a few hours a day. It’s more expensive but makes for a better cruising plan. Don’t suffer the fate of Samuel Taylor Coleridge’s ancient mariner — “Water, water, everywhere, nor any drop to drink.” Start with a good freshwater system and then maintain it to sustain your lifestyle.

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Home » Blog » Gear » Watermakers: a guide to marine desalinators and making water on a boat

Watermakers: a guide to marine desalinators and making water on a boat

By Author Fiona McGlynn

Posted on Last updated: March 23, 2022

There’s something magical about a watermaker—at least that’s how I felt after we installed one on our boat. That may sound overblown, but think about it: watermakers transform salt water into fresh water, providing a near-endless supply of potable water for drinking, bathing, and cleaning! THAT my friends is an amazing piece of technology!

(If you don’t share my enthusiasm, try going without a shower for a few days and you’ll begin to see my point).

watermaker makes freshwater for deck spray down

Having experienced living on a boat and cruising, both with and without a marine desalinator, I can attest that it’s a game-changing piece of gear. However, you definitely don’t need one to go cruising. There are plenty of low-tech ways to collect and make water on a boat.

Marine desalinators do offer some major benefits: there’s more water for showers, it’s easier to travel farther afield, you can spend more time in a remote location. However, these benefits have to be weighed against the drawbacks: namely a hefty price tag and ongoing maintenance.

Deciding whether a watermaker is right for you will come down to the type of cruising you’re doing, how much water you need, and your budget. Read on to learn about the pros and cons, costs, and key features of marine watermakers.

How does a watermaker work?

A watermaker on a yacht converts seawater into fresh water through a process known as reverse osmosis (RO). A high-pressure pump pushes seawater through a semi-permeable membrane that filters out salt, organics, and bacteria. The fresh water is pumped into your water tanks while the remaining brine bi-product is discharged over the side of the boat, back into the ocean.

Marine watermakers: the benefits and drawbacks

Less water rationing.

When we started our 13,000 mile trip across the Pacific, we didn’t have a watermaker. We were on a tight budget and decided to prioritize other pieces of equipment like a life raft and wind vane.

As a result, we became experts in conserving water on a boat . We would carefully ration out water for washing dishes, taking showers, and even brushing our teeth!

After getting a watermaker we became far less meiserly because we knew we could always make more water if we needed to. It was a relief to not be constantly thinking about how much water we were using over the course of a day.

That being said, we couldn’t relax completely. We had to keep our tanks topped up, so as not to run the pump dry. We also always carried potable water in reserve, in case our watermaker broke in the middle of a long passage.

More luxuries

Can’t live without a proper shower? A boat water maker can make water-intensive luxuries like freshwater deck washdown, freshwater flushing heads, laundry, daily showers, and even baths, a possibility.

As great as this sounds in theory, we were surprised to find that we didn’t indulge in more showers after we got the watermaker.

We continued to use a hand pump pesticide sprayer to shower on deck despite having a watermaker and shower below. While some of this came down to habit, we also disliked running our engine (and consuming diesel) just to run the watermaker.

transporting fresh water in blue jugs with a dinghy

No hauling water

For us, this was by far the greatest benefit of having a watermaker!

While cruising in the US and Canada, we could refill our water tanks at a dock or marina. This was a minor hassle because it involved pulling up the anchor and docking the boat.

In Mexico, it was more challenging to get water. We would fill 5-gallon jugs at the local water purification plant in town and wheel them back to our boat on a collapsible dolly.

It often took a couple of trips with the dolly and dinghy to fill our water tanks. Oh, and we broke our dolly, twice!

We realized that if we wanted to spend more time exploring, and less time hauling water, we would have to invest in a watermaker. When we reached La Paz, Mexico we bought a refurbished watermaker, and we were so glad we did!

Our sailboat water maker gave us the gift of time, especially in places like Mexico and the South Pacific, where there were limited opportunities to fill water tanks up at the docks. It also saved us paying docking and water fees.

We estimate that our boat water maker saved us anywhere from four to six hours every week, time that we could spend exploring the wonderful places we were visiting.

A clean, safe water source

watermakers can provide endless potable water for cleaning

In places where the drinking water may be suspect, a boat water maker can be a reliable source of safe drinking water (assuming it’s in good working condition!).

More time in remote locations

A watermaker is a great tool if you’re drawn to remote locations where you might be the only boat in the anchorage.

It wasn’t until we reached Los Frailes, a secluded village on the Baja, that we really began to think about buying a watermaker.

There we were in an idyllic anchorage, surrounded by spectacular hiking and fishing. There was only one problem—every two days we had to walk 10 miles into town with our water jugs and hope that some kind samaritan would give us a lift back to our boat.

Before having a watermaker, we’d often leave a place we loved just because we needed to fill up our tanks. With a watermaker, we were more self-sufficient and could stay an extra few days, or as long as we wanted!

The number one drawback is the cost. We were able to find a refurbished water desalinator for $3,000, which was a great deal but also a considerable slice out of our cruising kitty.

How much does a watermaker cost?

Powered desalination systems for your average recreational cruising boat range from around 3,500 USD to 11,000 USD, with the more expensive options offering higher production (gallons of fresh water per hour).

Ongoing maintenance

Watermakers are yet another piece of boat equipment that needs to be maintained.

The majority of watermaker problems are caused by not using it enough or not using it properly.

If a watermaker is not used for a few weeks, the planktonic organisms in the seawater will die, rot, and clog the membrane and filters. This can eventually damage the reverse osmosis membrane in the watermaker.

For this reason, boat water makers should be used frequently and regularly flushed with fresh water.

Watermaker flushing

Check your manufacturer’s instructions on how to flush.

Rainman recommends flushing the seawater out of the system with fresh water if you are not using the system for more than a day or two. After another week, you need to freshwater flush the system again or pickle it for long-term storage.

Of course, it’s easy to forget, so we made it a rule to freshwater flush our watermaker after every use.

This is one good reason to choose a watermaker with an output that will meet your water consumption needs but not exceed them. If you’re using it every second day, you won’t have to try and remember whether you’ve flushed it or not.

Flushing a watermaker is relatively simple but it does involve a bit of work. We used a system with buckets of fresh water to flush our system and it generally took about 5 minutes.

You can also buy systems that automatically flush your watermaker at pre-determined times—even when you’re away from the boat (more on autoflush systems below).

Whatever you do, don’t use chlorinated water to flush as it will destroy reverse osmosis membranes. It’s possible to buy a carbon filter to remove chlorine from water sources at the dock.

Pickling a watermaker

If you don’t plan on using your watermaker for a while it needs to be “pickled” with a special biocide to prevent growth and buildup which could render your reverse osmosis membrane totally useless.

A watermaker should also be pickled every so often to chemically cleanse the membrane.

In addition to flushing and pickling, you will also need to clean out and replace the raw water pre-filters.

Operating costs

When properly cared for, a membrane should last five to ten years. If you don’t properly flush or pickle your watermaker, it can be a lot sooner and membranes aren’t cheap, generally costing in the range of 200-700 USD.

You’ll also need to purchase pre-filters and pickling solution, which are generally quite affordable. It’s also a good idea to carry spare parts

Power consumption

Watermakers can be real power hogs. When Practical Sailor tested a dozen DC watermakers they found they could draw anywhere from 12 to 48 watts per gallon, a huge range in efficiency!

According to Practical Sailor, “for maximum efficiency none of the systems drawing 15 amps or more should be operated without running the engine at the same time.”

We had to run our engine for hours to fill our tanks, which was annoying (and loud) when we were hanging out at anchor and also used up another finite resource—diesel fuel.

In our view, this was the single largest drawback to having a watermaker aboard.

Keep in mind that your power supply will determine what type of watermaker you buy. You may need to upgrade your electrical panels, get a generator or high-powered alternator, add solar panels, or increase battery capacity to supply the demand.

You can’t make water everywhere

While watermakers offer great flexibility and freedom, you can’t just make water in any old spot. If you make water in a polluted marina or anchorage, you’ll risk clogging up your filter. Most cruisers will head out to open water to ensure the saltwater they’re using is as clean as possible.

Key features to look for

Powered or handpump, handpump watermakers.

Handpump watermakers tend to be small and portable, the perfect thing to keep in your ditch bag in the event of an emergency. They’re less expensive than powered watermakers and produce far less water, usually around one gallon per hour.

Though I do know cruisers who have used a handpump watermaker for everyday use, they typically tend to be kept aboard for survival situations.

Powered watermakers

Powered watermakers run off your electrical supply or engine and can produce tens of gallons of water per hour. They tend to be a lot more expensive, but they’re productive enough to replenish your tanks.

Electric or engine drive

Powered watermakers can be electrically driven, by AC or DC, or run off the boat engine.

AC watermakers

AC models can produce in the range of 20-60 gph and are ideal for cruisers with an AC generator or alternator on board. They can also be used on boats with ample solar or wind sources and an inverter.

DC watermakers

DC watermaker systems typically produce in the range of 10-30 gph and are ideal for boats with solar power or 12V battery power.

Engine-driven watermakers

On an engine-driven watermaker, the high-pressure pump is belt-driven. These can produce a considerable amount of water, even on small engines. For instance, engine-driven units produce between 20-60gph, twice what a DC unit can produce.

Energy recovery watermaker

DC watermakers have become more efficient in recent years thanks to energy recovery systems (ERS). When the water leaves the watermaker it is still under pressure. ERS uses a set of valves to make use of this excess pressure to help drive the pump, which can reduce energy consumption by as much as 80 percent.

Modular, self-contained, and portable watermakers

Watermakers can be bought as modular, self-contained, and portable units. Choosing the right one may depend on your boat size and layout and whether you’re comfortable installing the watermaker yourself.

Modular units

Modular units come as several separate components that you can mount and connect yourself. This obviously offers a lot more flexibility and is particularly useful on smaller vessels where you may not have a lot of space. The downside is that these systems will take longer to install.

Self-contained units

Self-contained units arrive pre-assembled. While easier to install, they’re often bulkier and best suited to a bigger cruising sailboat with a large engine room.

Portable watermakers

Portable watermaker systems, like the Rainman watermakers, are entirely self-contained. Their compact design makes them easy to move and stow and you can completely avoid a permanent installation.

Simply put the intake and brine discharge hoses overboard, the freshwater hose in your water tank and you’ll be making water in no time.

If you race, have multiple boats, or plan on selling your boat, a portable watermaker is a great option because it can be easily moved from boat to boat.

If we were to buy another watermaker, we would probably opt for a portable one.

Automatic flushing systems

Automatic flushing systems use your boat’s freshwater supply to flush the watermaker for several minutes every few days. These systems require additional components (e.g., a timer, carbon filters, and a motorized valve) and installation but they take a lot of the maintenance out of having a watermaker onboard.

Automatic Pressure Regulation and adjustable pump speed

Your watermaker’s efficiency will be affected by the temperature and salinity of the water you’re cruising in. Cold and highly saline waters (e.g., in the high latitudes) will be more work for your watermaker, so it will take longer to purify.

Some units feature Automatic Pressure Regulation (APR) and adjustable pump speed which can help compensate for fluctuations in water temperature and salinity.

Remote control panels

Some watermakers have the option of a control panel which allows for easier access and remote control. Control panels tend to have a fairly simple interface with just a few gauges but may include a salinity sensor—so you can keep tabs on water quality—and auto-flush integration—so you can flush your watermaker with the flip of a switch.

Top watermaker brands

If you’re considering buying a watermaker for a boat, here are some of the top brands to consider.

Cruise RO Watermaker
Echotec watermakers
Horizon Reverse Osmosis (HRO)
Sea Recovery watermakers
Schenker watermakers
Spectra watermakers

Fiona McGlynn is an award-winning boating writer who created Waterborne as a place to learn about living aboard and traveling the world by sailboat. She has written for boating magazines including BoatUS, SAIL, Cruising World, and Good Old Boat. She’s also a contributing editor at Good Old Boat and BoatUS Magazine. In 2017, Fiona and her husband completed a 3-year, 13,000-mile voyage from Vancouver to Mexico to Australia on their 35-foot sailboat.

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How Do Yachts Get Fresh Water?

Fresh water is undeniably an essential requirement on any sea voyage, even more so for long journeys on a yacht. This article provides an examination of how yachts maintain an uninterrupted supply of this vital resource while at sea. To learn more about the possible ways to achieve this feat and to get a better understanding of the underlying mechanics involved, stick with us till the end.

While on a yacht, gaining access to fresh water can impose a great deal of challenge, especially considering there's only seawater as far as the eye can see. There is, however, primary technology that has proven successful in turning this tide. Let's dive in to find out more about this ingeniously impressive method.

Desalination through Reverse Osmosis

The answer to the mystery of 'how yachts procure fresh water' is primarily based in desalination, specifically with a focus on reverse osmosis. This is a system that quite literally transforms seawater into drinkable water. To better grasp the essence of reverse osmosis, it's the process where high-pressure pumps are used to fight against osmotic pressure.

Once the seawater is pumped into the system with high pressure, it goes through a series of filters. The end result is drinkable water completely free of any salts or other impurities. However, one should note that the operation of these machines requires a considerable amount of energy.

Lastly, the benefit of onboard desalination through reverse osmosis is its efficiency and potential for sizable production. Desalination systems come in various sizes that can be selected depending on the yacht’s needs. For instance, with the right machinery, it is possible to generate up to 4000 litres of fresh water per hour.

Storing and Conserving Water

Obtaining fresh water is only one side of the coin; storing and conserving it is equally important on a yacht. Many boats have a system of internal freshwater tanks that are filled before departure. But these resources can deplete quickly depending on consumption, hence the importance of prudent usage and adequate conservation measures.

Potential conservation methods can include installing faucets that operate using foot or knee levers to reduce wastage and adopting water-saving appliances like efficient dishwashers or washing machines. Incorporating simple practices like these can significantly reduce freshwater consumption on board.

Moreover, rainwater collection is another potential method of sourcing fresh water, which, while primarily used in emergency situations or when at anchor, could supplement onboard supplies.

Maintaining Water Quality

Ensuring the quality of the onboard freshwater supply is another critical aspect. Regular maintenance and sanitization of systems, filters, and storage tanks are of utmost necessity. Moreover, it is advisable to regularly test the water for any potential contamination, ensuring the health and safety of those on board.

In the case of reverse osmosis systems, routine maintenance may involve filter replacements and system checks to ensure optimal functioning and water quality. Furthermore, it is important to remember that while this process does remove salts and impurities, it does not necessarily remove all potential bacteria, thus additional purification steps may be needful depending on the source water.

In Conclusion

In summary, ensuring a steady supply of fresh water on a yacht involves a synthesis of innovative technology like reverse osmosis desalination and practical habits for conserving and maintaining water quality. These systems and practices collectively ensure that voyagers have access to the essential supply of freshwater during their sea journeys.

Taking a step further, why not consider investing in a marine watermaker to take care of your fresh water needs on your next yachting expedition? With our state-of-the-art technology, you can transform seawater into potable water, anytime, anywhere. Get a free quote for a marine watermaker today and set sail with confidence knowing your freshwater needs are well taken care of.

Darryl Massey is a seasoned expert in reverse osmosis watermaker technology, with a keen focus on sustainable solutions. With over two decades at EcoSistems, Darryl combines deep technical knowledge and a commitment to innovation, contributing to the development of energy-efficient systems. His expertise ensures advanced, reliable solutions in water purification for clients across the globe.

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Yachting Monthly

Digital edition

5 of the best watermakers: From ERD to high pressure units

February 28, 2023

When it comes to watermakers picking the best for you is crucial with a key decision being the type you go for an its energy usage.

Watermakers – technically known as desalination units – use a process called reverse osmosis (RO) to make drinking water. By forcing salty water at a high pressure against one side of an RO membrane, fresh water will slowly seep through, leaving the salt and bacteria behind. The output is notably devoid of minerals, but the taste can be a little strange at first.

There are two main types of watermaker. High-pressure pump watermakers are fast, but they aren’t the most energy- efficient way of creating clean water. They are usually tuned to produce 60 litres per hour or more but can draw upwards of 500W and while there are 12V versions, they typically use mains voltage pumps and are better suited to being run from a generator than a battery bank.

They’re designed to fill your tanks quickly so you don’t have to run the generator for long. Mechanically, they’re simple, and apart from the high-pressure pump there are no moving parts to go wrong.

The alternative method is a Clark pump watermaker, also known as an energy recovery device (ERD). This uses a fast-running but much lower-pressure pump which needs less power. To obtain the high pressure required, the pressure in the discharge water is harnessed by a couple of reciprocating pistons and used to boost the inlet pressure. It takes a few minutes to build up pressure and during that time the output is slow and not very clean.

Best watermaker: ERD units

Schenker Zen 30

I’ve yet to meet the owner of a Schenker Zen 30 who isn’t an evangelist for this machine. The Italian brand has been evolving its range since 1998 and offers a three-year warranty. Measure twice – the pump and membrane make up a bulky unit.

Buy it now from ebay

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Osmosea units

I love the design of the Osmosea units, which only have one moving part and are one of the cheapest ERD units out there, although reliability is poor, due to the materials used. Cheap second-hand ones are often available, so worth considering if you don’t mind doing a bit of engineering.

Buy it now from Osmosea

Spectra Catalina

While not flawless, this has one of the best build qualities. You’ll find dealers in remote locations, but expect a hefty bill for parts and labour.

It’s a modular design which makes installation easier, but while none of the modules are huge, there are a lot of modules.

Buy it now from GDS

Best watermaker: High pressure units

SeaWater Pro

SeaWater Pro grew out of a garage project using a pump from a Karcher K4 power washer and a garden hose timing unit, but they’ve come a long way since then. Their latest units now use stainless steel pumps which, unlike Karcher pumps, are designed specifically to propel saltwater.

Buy it now from SeaWater Pro

French brand Dessalator uses beautifully over-engineered pumps with a simple user interface control. Despite being a high-pressure system, they offer a couple of 12V versions, the smallest drawing around 30A and rated at 30 litres/hour. They are very pricey, but the only running costs for years will be pre-filters.

Buy it now from Dessalator

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How Do Yachts Get Fresh Water?

Getting fresh water on a boat is crucial for maintaining hydration, cooking, personal hygiene, cleaning, equipment operation, emergency preparedness, and overall comfort. Fresh water is essential for drinking, preventing dehydration, and supporting bodily functions. It is needed for cooking meals, cleaning ingredients, and maintaining proper hygiene on board. Fresh water is also used for cleaning the boat, rinsing equipment, and ensuring systems operate effectively. In emergency situations, it serves as a vital resource for first aid and providing drinking water. Having an adequate supply of fresh water enhances comfort, cleanliness, and overall enjoyment while out at sea. So, how do yachts get fresh water? Our boat desalination unit manufacturer explores more in the following article.

How Do Yachts Have Fresh Water?

How do yachts get fresh water? Yachts typically have fresh water on board through a combination of storage tanks, watermakers, and shore connections. Freshwater storage tanks are built into the yacht’s structure and can hold a certain capacity of water. One of the ways that yachts get access to fresh water is by filling up water tanks when the boat is docked. This is an incredibly convenient process for boats to get fresh drinking water when they are connected to the shore. However, this is inconvenient when the boat is not docked. In this case, the best course of action would be to purchase a watermaker for the yacht system. This allows fresh water to be made from the water that the boat is floating on. This means that boaters have a virtually unlimited supply of water when they are using their boat. Some of the most popular fresh watermakers for boats include our selection of watermakers. These are:

12/24v DC Economy Watermakers
115/230v AC Yacht Series (Modular)
Belt-Driven DC Watermakers (Modular)
115/230v AC Pro Series (Semi-Modular/Self-contained)
12 – 180v DC Watermakers
And other 12v watermakers

How Do Fresh Watermakers for Boats Work?

Reverse osmosis (RO) is a process that uses pressure to force water through a semipermeable membrane, removing impurities and producing purified water. Water is pressurized and forced through the membrane, allowing only water molecules to pass while blocking contaminants and dissolved solids. This process effectively removes salts, minerals, bacteria, viruses, and other impurities from the water. The purified water, known as permeate, is collected, while the concentrated impurities are diverted as reject or brine.

What Are Fresh Water Pumps for Yachts?

Our engine-driven watermaker manufacturer would like to point out the difference between pumps and watermakers. Freshwater pumps for yachts are devices that are used to circulate and deliver fresh water throughout the yacht’s plumbing system. These pumps play a crucial role in providing a pressurized water supply for various onboard applications. While these pumps are crucial to a boat, they do not produce fresh water.

More About ECHOTec Watermakers

How do yachts get fresh water? We hope we were able to answer this question and more for you in our article. ECHOTec Watermakers is a team of manufacturers for fresh watermakers that are dedicated to making sure that our customers have the highest quality products available for the price. Our marine desalination systems are here to give you an effective and necessary tool for you to enjoy. Schedule an appointment with us today to learn more about our engine-driven watermakers and sailboat watermakers.

How to Purify Saltwater

How Is Sailing Sustainable? How Watermakers Make Sailboats Eco-Friendly

Yachting World

Digital Edition

Water on board: what should you carry? We ask ARC skippers for tips for an Atlantic crossing

Toby Hodges
August 17, 2015

Storing, rationing and making fresh water on board is a key concern when you're making an Atlantic crossing. Toby Hodges asks 193 skippers on the ARC for their tips

Photo: Richard Langdon/Ocean Images

So how do you decide how much water to ship for an ocean crossing?

Our survey of the Atlantic Rally for Cruisers (ARC) 2014 fleet centred around water, its stowage and use, and its production via watermakers. We asked all the skippers taking part in the ARC and ARC+ (via the Cape Verde Islands) detailed questions about how much water they carried, in what form, how they used it and their tips for water management. We also asked those with watermakers – almost 60 per cent of the fleet – how their equipment was powered and how it performed.

The overriding advice from the 193 respondents to our survey is to fit a watermaker. Although most skippers today are still very disciplined in their water rationing, the advent of reliable watermakers makes life aboard much more comfortable – and hygienic.

You can’t be complacent, however. A watermaker needs to be installed well in advance of an ocean crossing and maintained routinely. Even then they are not foolproof.

Yachts with watermakers on the 2014 ARC exceeded those without by some margin – 134 versus 88. The majority of those without watermakers were yachts in the 40-45ft bracket, which generally had 300-500lt tanks and more than 200lt of bottled water aboard.

The average LOA of yachts that carried a watermaker was 48ft (14.68m), but the range was great – the second smallest yacht in the fleet, the Allegro 33 Efwa , had a watermaker plus 150-200lt of bottled water to supplement their sub-300lt tanks. And the majority of those with watermakers still took 200lt plus of bottled water (the maximum amount they could indicate in our survey).

As well as for drinking, showering and cooking, water was used mostly for washing dishes, decks and clothes, and general cleaning. “Diluting whisky,” was a necessary requirement reported by Oyster 575 Helen .

But the Lagoon 450 Ripples would get my vote for the yacht to be aboard, as water was needed for the “washing machine, ice-maker and foot spa”.

Bottled water

The 193 yachts surveyed on the 2014 Atlantic crossing between them carried more than 27,720lt of bottled water, or an average of 144lt per boat. And as the maximum amount they could enter was ‘200lt plus’, in reality the average was probably a fair bit higher.

What really strikes us here is the amount of plastic carried across the Atlantic. Yet there was only one comment on a viable alternative, from Nicola Henderson on the First 40.7 Hot Stuff : “Use collapsible water containers (available from eBay) – no rubbish and can be reused.” It is likely that many crews shipped water in large jerrycans too.

Managing water – the skippers’ tips

Use salt water.

Other than installing a watermaker, the biggest piece of advice from the ARC skippers is to use salt water wherever possible. Whether washing dishes, clothes, taking seawater showers (finished with a fresh water rinse) or boiling carbs, the use of the abundant resource you are sailing on makes good sense. After all, the world’s best shower is a mid-Atlantic swim – or a bucket over the head on the aft deck.

The top tip from many skippers was to install a saltwater pump in the galley and heads. “Seawater can be used in all sinks on board,” declared the crew of XC42 Euphoria . “Shut down the pumps and only use seawater for washing hands. Shower from buckets on the aft deck.”

Florent Duperron says they used salt water for dishes, laundry and showering (from buckets) aboard the Hallberg-Rassy 352 Millicent . For freshwater rinses, water was measured out in one-litre bottles to keep a tab on how much was used.

By using predominantly sea water, the ten crewmembers aboard the 59ft Peter von Seestermuhe used just 500lt of fresh water over 15 days.

Be disciplined with rationing

“Do not give the crew unlimited access to the bottled water,” was the advice from Hanse 445 Fortune Cookie skipper Wilhelm Bögershausen. Ayama ’s Stefan Berg was also adamant: “Don’t use bottled water; use tank and watermaker; carry 20lt bottled for emergency.”

Scarlet Oyster ’s skipper Ross Applebey concurred, recommending his method of “emergency water bottled in the bilge and using a day tank filled by the watermaker”. His top tips were also to “turn off the electric pump and wash dishes in salt water”.

The crew of Swan 80 Berenice admitted they should have carried more water (this despite having 1,000lt+ tanks, 200lt+ bottled and a watermaker) to cater for 12 on board. Interestingly, they had no saltwater or manual pump.

Limit running water

“When you open the tap, immediately half close it,” Jeanneau SO49DS Soulmate recommended.
“Wash dishes in salt water and turn off water pressure switch on panel,” Hunter 410, Morning Haze .
“Turn the pump pressure down so all taps run slower,” Humphreys 77 Aglaia .
“Keep water pressure pump off at all times,” said Swan 46 Aphrodite .
“Switch off electric pumps and dispense water to crew in bottles so you know the intake,” Jeanneau Trinidad 48 Aislig Bheag .
“Transfer out of tanks to bottles for a daily amount for cooking and 1-1.5/2lt bottle in heads for usage, in case the gauges are not accurate,” First 40 Southern Child .
“Fit an adaptor to the mixer tap that allows you to stop the flow without wasting water temp,” Hallberg-Rassy 39 Anika .
“Collect cold water from the shower when waiting for hot,” Outremer 51 Intrepid Elk .

Keep some in reserve

Both the 100ft Leopard by Finla nd and the Jeanneau SO54DS Theta recommended keeping one tank full and isolated for emergency use only.

Meanwhile, crew on Swan 65 King’s Legend said they “only drink watermaker water. Bottles are for emergency.”

“Keep one tank full and untouched. Send made water to the other. When watermaker fails the other tank is full in reserve,” declared the crew of Reservoir Dogs.

“Refill empty plastic bottles with watermaker water,” said Paul Frew on Oyster 575 Juno . This advice was echoed by Oyster 46 Cloud 9 of Kingswear , which “arrived with same amount of drinking water that we left Canaries with”.

“We carefully regulate bottles available in one locker so we can easily see what is being used,” First 40.7 Lancelot II .

Be creative with your drinking water

“We use exclusively water coming from the watermaker. For cooking and drinking, water from the watertank is filtered through a Seagull filter. We fill our bottles from this and carbonate them with a Sodastream system to have perfect sparkling fresh drinking water,” Amel 54 A Plus 2 .
“Add minerals to tap water,” Sly 47 Neveralon .
“Alternate tanks to be used to ensure fresh water,” Leopard 44 Libeccio .
“Collect rainwater from the hardtop,” [catamaran] Privilege 37 Tanoa .
1. The stats
2. How a watermaker works
3. Watermakers – skippers’ views

Water Maker: Ensuring a Steady Supply of Freshwater on Your Vessel

Sailing on the open sea, away from the bustling city life, is an exhilarating experience that offers a sense of freedom and adventure. However, one crucial challenge that every mariner faces is access to a reliable freshwater supply. Exploring distant shores and embarking on lengthy journeys can quickly deplete onboard freshwater reserves, leaving sailors and yacht owners with a critical need for an alternative solution. That's where water makers come to the rescue.

Understanding Water Makers

1. what is a water maker.

A water maker is a vital device used on boats, yachts, and other marine vessels to convert seawater into fresh, potable water. This technology has revolutionized long-distance sailing by ensuring a continuous supply of freshwater without the need to rely solely on shore provisions. Water makers utilize advanced desalination techniques, particularly the reverse osmosis process, to remove salt and impurities from seawater, producing clean, drinkable water.

2. Importance of Water Makers for Boats and Yachts

The significance of water makers becomes evident when you are days or weeks away from land. They provide a reliable and safe source of freshwater, allowing sailors and yacht owners to extend their trips and explore remote destinations without the fear of running out of water. The availability of freshwater onboard brings peace of mind and enables mariners to embrace longer journeys, discover new horizons, and engage in the true spirit of maritime exploration.

How Water Makers Work

3. reverse osmosis process.

The heart of a water maker is the reverse osmosis (RO) process. This intricate process involves subjecting seawater to high pressure and forcing it through a semi-permeable membrane. The RO membrane allows water molecules to pass through while blocking the dissolved salts and other impurities, effectively separating freshwater from seawater. The resulting freshwater is then collected and stored for use, providing a consistent supply of clean drinking water.

4. Components of a Water Maker

A typical water maker consists of several essential components that work in harmony to produce freshwater efficiently. The first step involves a pre-filter, which removes large particles and debris from the seawater, protecting the RO membrane from clogging. Then, a high-pressure pump pressurizes the seawater, preparing it for the reverse osmosis process. The RO membrane is the core of the system, where the desalination magic happens. Finally, a post-filter further enhances water quality by removing any remaining impurities before the freshwater is ready for consumption.

Types of Water Makers

5. marine water makers.

Marine water makers are specifically designed to cater to the needs of boats and yachts. They are compact, energy-efficient, and can be installed even on smaller vessels. Marine water makers come in various sizes and capacities, ensuring there's an appropriate model for every vessel type. These systems are engineered to withstand the challenges of the marine environment, making them a reliable and convenient choice for sailors.

6. Boat Water Makers

Boat water makers are designed for smaller boats and offer a range of output capacities to meet different water demands. These compact systems are perfect for boat owners who embark on day trips or short journeys and require a steady supply of freshwater. Boat water makers are relatively easy to install and operate, making them an accessible and affordable option for boat enthusiasts.

7. Sailboat Water Makers

Sailboat water makers are tailored to the unique needs of sailboat owners who value independence and self-sustainability during extended voyages. These systems are lightweight, space-efficient, and can be easily integrated into the limited spaces of sailboats. Sailboat water makers allow sailors to venture into remote regions without worrying about water scarcity, fostering a genuine connection with nature and the sea.

8. Yacht Water Makers

Yacht water makers are designed to cater to larger water demands on luxury yachts, providing a steady supply of freshwater for all onboard needs. These sophisticated systems often come with advanced features, such as touch-screen controls and automatic operation, enhancing user convenience. Yacht owners seeking the utmost comfort and luxury while exploring the world's oceans will find these water makers to be a valuable addition to their vessels.

Read our top notch articles on topics such as sailing, sailing tips and destinations in our Magazine .

Check out our latest sailing content:

Choosing the right water maker for your vessel, 9. considerations for selection.

Selecting the right water maker involves careful consideration of several factors. Vessel size, water consumption needs, available space, and budget play a crucial role in determining the most suitable water maker for your boat or yacht. Additionally, considering the vessel's specific cruising patterns, the number of occupants onboard, and the duration of voyages will help in making an informed decision.

10. Size and Capacity

Choosing the right size and capacity of the water maker is essential to ensure an adequate supply of freshwater without excessive energy consumption. Assess your vessel's freshwater needs based on the number of people onboard, the duration of trips, and any additional water usage requirements, such as cooking and hygiene.

11. Energy Efficiency

Energy efficiency is a vital aspect to consider, especially when sailing for extended periods where power supply might be limited. Opt for water makers with energy-saving features and consider integrating renewable energy sources, such as solar panels or wind turbines, to power the system.

12. Maintenance and Service

Ensure the chosen water maker is easy to maintain, and there is ample service support available. Regular maintenance is crucial to the proper functioning of the water maker and maintaining water quality over time.

Installing and Operating a Water Maker

13. installation process.

Professional installation is recommended to ensure the water maker is correctly fitted and calibrated for optimal performance. Improper installation can lead to issues such as leakage or inefficient water production. It's advisable to rely on the expertise of experienced marine technicians for a seamless installation process.

14. Operating Tips

Following the manufacturer's guidelines for operating the water maker is essential to ensure its efficiency and longevity. Regularly monitor system parameters and water quality to detect any anomalies early on. Familiarize yourself with the system's control panel and functions, and perform routine maintenance tasks as recommended by the manufacturer.

Benefits of Having a Water Maker Onboard

15. independence and self-sustainability.

A water maker provides mariners with a sense of independence and self-sustainability while at sea. Reliance on shore water provisions becomes a thing of the past, allowing sailors and yacht owners to venture into more secluded and less frequented destinations. This newfound freedom fosters a deeper connection with nature and a stronger appreciation for the marine environment.

16. Cost-Effectiveness in the Long Run

While the initial investment in a water maker may seem substantial, the long-term savings on water provisioning make it a cost-effective solution for dedicated sailors and yacht owners. Repeatedly purchasing bottled water or relying on expensive shore water can quickly add up over time. A water maker provides a more economical alternative, making it a sound investment for those committed to long-distance sailing.

17. Convenience and Safety

Having a water maker onboard eliminates the need to carry heavy water containers, which can be cumbersome and limit valuable storage space on the vessel. It also reduces the risk of water shortages during long trips, ensuring the wellbeing and safety of all onboard. With a water maker, mariners can focus on their journey, knowing that a continuous supply of fresh, clean water is readily available.

Addressing Common Concerns

18. is the desalination process safe for the environment.

One common concern associated with water makers is the environmental impact of the desalination process. The reverse osmosis process used by modern water makers is environmentally friendly. It does not produce any harmful by-products or chemicals, and the brine generated during the process is typically diluted and safely discharged back into the ocean.

19. What About Water Quality and Taste?

Modern water makers are equipped with advanced filtration systems that ensure high-quality, great-tasting freshwater. The RO membrane effectively removes salts and impurities, resulting in pure, clean, and refreshing water.

20. Dealing with Potential Malfunctions

While water makers are generally reliable, occasional malfunctions may occur due to various factors such as improper maintenance or component wear. Understanding how to troubleshoot common issues is essential for mariners to address problems promptly and minimize any disruptions to the water supply.

21. Regulations and Legal Considerations

Operating a water maker on the open sea requires adherence to specific regulations and legal considerations. Some regions have restrictions on discharging brine into certain marine areas. Mariners must be aware of these regulations and take the necessary measures to protect marine ecosystems.

The Future of Water Makers in the Marine Industry

The future of water makers in the marine industry is promising, driven by the increasing demand for sustainable and eco-friendly solutions. Advancements in desalination technologies and materials are expected to lead to even smaller, more energy-efficient water makers capable of catering to various vessel sizes and water demands. Integrating renewable energy sources to power water makers will also become more prevalent, enhancing the sustainability of long-distance sailing.

Water makers have revolutionized the way sailors and yacht owners approach their journeys. These incredible devices provide a continuous supply of fresh water, ensuring self-sustainability and safety during extended trips at sea. Embracing this technology opens up a world of possibilities for mariners, allowing them to embark on thrilling adventures without water scarcity concerns. Investing in a high-quality water maker is an investment in the comfort, convenience, and safety of everyone onboard.

So what are you waiting for? Take a look at our range of charter boats and head to some of our favourite sailing destinations.

FAQs about water markers

Can i drink the water produced by a water maker, how much power does a water maker consume, are water makers easy to maintain, can a water maker be retrofitted on an existing vessel, do water makers require regular servicing, i am ready to help you with booking a boat for your dream vacation. contact me..

Denisa Kliner Nguyenová

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The term “freshwater yacht” was an oxymoron until J. David Weiss designed Invictus , a futuristic 80-footer that redefines large houseboats. Having penned dozens of oceangoing superyachts for Europe’s leading builders, Weiss was given carte blanche by Arizona-based Bravada Yachts to create a new freshwater category. “The designs have typically been boxy, bloated RVs,” he says. “The good news is their scale can provide a custom yacht experience.”

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How Do Yachts Have Freshwater?

Yachts typically have fresh water on board through a combination of storage tanks, watermakers, and shore connections. Freshwater storage tanks are built into the yacht’s structure and can hold a certain capacity of water. Most sailboats get their fresh water from onboard tanks that they fill up from dockside water sources. They can also use desalination systems to take salt out of seawater. A yacht water system refers to the plumbing and supply system that provides fresh water on a yacht, including tanks, pumps, filters, pipes, faucets, and other essential components.

Storing, rationing, and making fresh water on board is a key concern when making an Atlantic crossing. On a boat, one cannot rely on gravity to distribute water to the various drawing points. The resulting freshwater is piped to the vessels water tanks and the remaining brine discharged overboard. Watermakers vary in the type of pump they employ, which can vary.

Most yachts, sailboats, and commercial vessels have an onboard Desalination Water System, which is a water filtration process that removes salts and other minerals from saltwater. The desalination process makes saline water potable for consumption and irrigation. Freshwater is essential for the crew and passengers on board to meet their daily needs.

The answer to how yachts procure fresh water is primarily based on desalination, specifically with a focus on reverse osmosis. Boats have a freshwater storage tank filled with potable water, and only the shower and sink need fresh water. They consist of one or more tanks, often with level monitors, feeding through a sediment filter to a pressure pump.

Most modern superyachts are equipped with desalination systems, which are essential for long voyages, particularly those taking place in remote areas.

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Debbie Green

I am a school teacher who was bitten by the travel bug many decades ago. My husband Billy has come along for the ride and now shares my dream to travel the world with our three children.The kids Pollyanna, 13, Cooper, 12 and Tommy 9 are in love with plane trips (thank goodness) and discovering new places, experiences and of course Disneyland.

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I have seen and read about water makers. But never had it explained so well as you just did. Thank you, Dan, for producing this article for us. It is amazing to produce freshwater on demand. But unsure I could handle the responsibility to run it, or flush it with fresh water, or pickle it, every couple of days.

I used to sell water treatment equipment and RO’s (Reverse Osmosis) units were part of that. Those, however, could not handle an initial TDS of any more that about 2000 PPM. They were rated to take the TDS down to 95% of original when the membrane was new and 90% when it was nearing end-of-life. So for the most mineralized water it would take it down to 100 TDS when new. The system shown here, however, is much more capable of removing salt and other dissolved minerals. The PRESSURE is what makes it happen. For the household RO’s, there was usually no pressure pump as the normal house pressure – between 60 and 100 psi – was enough for them. Nice to see this shown in detail.

Would be nice if you could have discussed the cost to build your system, including maintenance costs for filter replacement, replacement of the salt separator cartridge, and volumes of water per unit time that you are able to produce. Do you use this water strictly for drinking, or for toilets, showers, cooking, drinking, washing, etc? What is the quality of water (purity) that you are able to reliably and consistently produce?

Thanks, but i have a question when we get a product water and it flows through diverter valve and it has some salinity left which get discharged with brine water after that the valve is flipped hut how do we know that there is still salinity left and when do we turn that valve to get that fresh water product???

Hey man, great vid. Have you done any testing at the faucet to confirm salinity or check for bacteria? I’m in the process of shopping a looper and am also curious about “most common” water systems installed and filter replacement/system review procedures. I’d want to do a complete refurb on anything used. Again, good job! Thanks.

You usually only pickle it for storage. Flush it with freshwater after every use. Every few months you can do a flush using the same products used to pickle. You just recycle the chemicals through the system using a pump and bucket. Kills everything in there and saves the membranes. I didn’t see a carbon filter.

Why does so much PSI have to be used 700 PSI is way up there. Home service water line only reaches 80 PSI. Pickling I assume is sanitizing/sterilizing like using small amounts of bleach on dishes to kill bacteria. I’m not a boater just curious about the desalination to instant potable water and I assume this would work for Brackish lake water. Anyway great article

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Everything You Ever Wanted to Know About Mega-Yachts (and Their Owners)

Question number one: do they need more friends.

Yacht-setters, i.e. the maritime equivalent to jet-setters, circle the globe on mega yachts, the price tags of which can easily equal the yearly-budgets for a small nation. But don’t think it’s easy being rich — these gazillionairs have their yachting woes . The Biggie: when their mega yacht breaks down in a foreign port.

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I asked Sean Blue, Head of Global Watercraft for AIG Private Client Group (which represents the owners of more that 300 80-foot-plus super yachts worldwide), to tell me about mega yachts and their owners .

Who are the owners of super yachts? I can’t divulge our clients, but I can share that mega yacht owners include CEOs of Fortune 500 companies, captains of industry, entertainers, engineers, inventors, rulers, owners of manufacturing companies, billionaires, and generally people who are leaders in their fields. Mega yachts are generally defined as yachts greater than 100 feet or longer, all the way up to the current largest yacht in the world — AZZAM, which is 180.6 meters long (594 feet).

Tell me about the distances these yachts can navigate. This depends on the specifications of the yacht and what it was designed for . Some are not designed to travel long distances and instead are built for speed, or for local cruising, or with maybe enough range to make a trans-Atlantic crossing safely. But others are built with an incredible amount of range in mind and can travel some 8,000 nautical miles without refueling, while others are designed to explore arctic regions, or both. Circumnavigations are not uncommon and large yachts regularly make ocean transits — whether cruising from the Mediterranean to the Caribbean, or en route to Fiji across the Pacific. The only real limitations are time and money. And for most mega yacht owners, it’s just time.

Are these really ships — how do you differentiate a yacht from a ship? Some of them really are ships and are built that way, but the difference lies in how they are used. A yacht is a vessel built for the pleasure of her owner. The best yachts are built to commercial ship standards in terms of seaworthiness, safety, and technology; often times even a higher standard.

How about the price tag for these yachts? $1,000,000 a meter is the rule of thumb, but this can vary depending on the design, builder, systems, interiors and a great many other things. The largest yacht currently in the world, AZZAM, is reported to have cost over $700M to build. In addition to the yachts themselves are the interior décors and furnishings, wine collections, fine art collections, and its “toys” and tenders (support vessels).

What happens when a yacht breaks down on the other side of the globe? Mega yachts are managed and run by highly trained professionals from the captains and crews to the yacht managers that are often hired to manage all the aspects of owning and running a yacht. Not unlike the world of aviation, maintenance is ongoing, so an all-out breakdown on the water whereby you have a dead ship is a relatively rare occurrence. Fire aboard a yacht is actually a little more common, which is the primary source of large losses on yachts that AIG has seen, and something to which we pay a lot of attention by providing shipboard fire training for crews and local firefighters in seaside communities. Whether it’s a breakdown or a fire, after the initial response to save lives and property, the yacht may call for assistance from a neighboring ship or vessel and in some cases call a towing or salvage company for assistance to get the yacht back to the nearest safest port to evaluate damage and decide on next steps. That is usually when specialty insurers are called to facilitate the logistics and repairs.

What if it just needs work? Most of the work performed on a super yacht is performed by its crew. If there is need beyond that, specialists can be flown in from all around the world. Larger yachts are like big commercial buildings with air conditioning systems, watermakers, plumbing, electrical, hydraulics, refrigeration, and virtually any mechanical system you can imagine. If expertise is not available locally, you get the experts to come to you.

Where do they go for repairs? The best local place they can find that can address the yacht’s specific need. There are numerous facilities around the world that can accommodate and repair mega yachts, but as you get farther from the Western world, these facilities may not specialize or deal with yachts everyday and may be more directed toward commercial work and a more industrial level of care and finish quality. Often in these situations, repairs are made for the safety and seaworthiness of the yacht and cosmetics are handled at a later date at a facility specializing in the high level of yacht fitting and finish.

Does work need to be done on dry land? Some works can be accomplished while the yacht is in the water , even if it involves work to the bottom or propulsion or stabilizer equipment and that may sometimes be a safer and less expensive route if it’s feasible, but some maintenance and repair does require a haul out on land or dry dock.

How much does a typical yacht weigh? There really is not a typical yacht, and the weight can vary greatly. Yachts are generally measured in gross tonnage, which is a volumetric measurement. A yacht at the smaller end of the Mega Yacht segment, such as a 112-foot Westport, displaces 275,000 pounds and carries a gross tonnage of 207 gross tonnes. AZZAM, the largest yacht in the world, which is 590 feet long and was built by Lurssen in Germany, is reported to be over 13,000 gross tonnes.

Are there places in the U.S. that repair yachts? The U.S. is blessed with many great facilities around the country and on every coast that are capable of repairing and refitting yachts and mega yachts. Some are boat and ship yards that are also involved in building yachts, while some are mixed between private and commercial work, and others cater exclusively to the mega yacht community. South Florida is certainly an area of concentration for these facilities, but not the only region where one can find them.

Are there cranes capable of lifting these heavy yachts? Travel lifts can accommodate some pretty large yachts, but at a certain size, a dry-dock might be necessary and in these cases, this can certainly limit your options on where your yacht can be hauled and repaired.

An aside: Marine Group Boat Works in San Diego caters to mega yacht owners. Its six-story traveling crane is capable of lifting 665-tons. Each tire (there are 16) stands a foot taller than a grown man. The crane is said to be the strongest mobile crane in the U.S. It made record books when the 626 ton mega-yacht Ronin (previously owned by billionaire Larry Ellison – now owned by Venezuelan banker Victor Vargas ), became the largest private yacht ever to be lifted by a moving crane.

Everything You Ever Wanted to Know About Mega-Yachts (and Their Owners)

SEE ALSO : From the Old West to Alien Landscapes: Where to See the Best Art in Denver

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The latest in watermaker and water purification technology and innovation., clean, fresh water more than a luxury on a large yacht.

The freshwater demands on a large yacht are considerable. Beyond mere drinking and bathing, there’s often a need to fill hot tubs and pools, and use them for boat systems and routine deck washing. FCI Watermakers’ innovative Neptune series makes from 3,400 – 10,000 gallons of pure, fresh water every day—enough for the most sizable vessel.

The Neptune is the industry standard for large, reliable, and highly efficient marine reverse osmosis systems. Commercial-grade, non-proprietary parts and assemblies ensure 24/7 performance. It has type certification approval from ABS, CE, GL, Lloyd’s Register EMEA, Det Norske Veritas, and Russian Maritime Register of Shipping.

The unit comes with FCI Watermakers’ next-generation V4 control system. The intuitive 7″ color touchscreen panel provides instant access to Neptune’s water making processes. Marine-certified for temperature extremes allows for its use in often hot and humid engine rooms.

With +APC (automated pressure control), the water making process becomes truly touch-free. The system will start, make water, run diagnostics, shut down, complete a freshwater flush and come back online, all automatically.

Because an ocean-going yacht can find its way to the most remote corners of the world, it must contend with high levels of sedimentation and fluctuating salinity levels. The Neptune is engineered to perform in environments where other systems become inoperable or cannot achieve the required output.

When a yacht is dockside, FCI Watermakers’ optional Dockside Treatment System (DTS) is ideal. Working in-line with the Neptune, or as the stand-alone DTS+Solo, the DTS connects to the marina’s water service. Removing 99% of total dissolved solids, it provides easy, spot-free rinsing for deck and hull washing. In areas where there are safety concerns surrounding the potable supply, it removes 100% of viruses, cysts, and bacteria.

FCI Watermakers only builds state-of-the-art watermakers. The company’s dependable units are trusted worldwide for use on thousands of yachts, and commercial and naval vessels. It offers models with capacities from 200 to over 265,000 gallons per day.

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How Does Plumbing Work in a Yacht?

As you might suspect, boat plumbing in Ft. Lauderdale, FL is different from household plumbing. Though it shares some similarities with RVs, like small space and mobility, there are differences between them, too.

First of all, you’re not on solid ground, and there’s a plumbing system to safely discharge the water you use on your boat. Second, and this applies even more so to saltwater vessels, you need to have storage for the water you’re going to use. How does plumbing work on a yacht? How does the water get to and drain away from sinks, showers and toilets? Read on to find out.

Let’s start with how the water gets in. Boats have a freshwater storage tank filled with potable water. Only the shower and the sink need fresh water, and both use a pump to draw from this tank as their source. Obviously, the toilet doesn’t need to be filled with drinking water, so where does that water come from? The toilet on a boat is either a chemical toilet (something like a nautical porta potty), or it uses a device called a seacock to get water from the outside. This is a valve that draws water in from wherever you are floating with the use of a pump. It has a mesh filter that keeps out debris.

Now that we’ve got water in, how does it get out? And what keeps it from polluting the water around you?

Used water from sinks and showers can be routed through a gray water system. In this system, used water goes through a P-trap and then out into the water. Because it goes back out into the environment, you must use biodegradable soap, which is usually labeled “no phosphates.” Water from the shower drains either to the bilge or to a dedicated shower sump, and from there it’s pumped outside (usually above the waterline).

Of course, you don’t want anything from the toilet going out into the environment, so for this “black water,” there is a holding tank. This tank can be emptied as a dock with a pumping station.

Getting around

How does the water get around? The pumps are the main force for moving water, and these can either be electric or manual. The type of pump you use will also determine what kind of spigot your faucet requires.

All the piping for the water system on your boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this. Recently, however, semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs, and can be combined with quick-connect fittings for easy assembly. PE tubing comes standard in opaque white, but you can also get it in different colors like blue or red, which may come in handy down the road for identifying water lines. PE is less flexible than PVC and must be cut to specific lengths, but the tubing is cheaper than PVC.

For more information about how your yacht’s plumbing works in Fort Lauderdale, FL, call Starboard Yacht Group LLC today.

For any upgrades or refits, please reach out to us at Starboard Yacht Group.

We offer many different services designed to keep your vessel in pristine condition.

IMAGES

How Do Yachts Get Fresh Water? (Top Tips & Tricks)
How Do Yachts Get Fresh Water? (Top Tips & Tricks)
How Do Yachts Get Fresh Water?
How Do Yachts Get Freshwater?
Megayachts explained
Inside The $8,000,000,000 Mega Yachts

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HOW DO WE GET FRESH WATER IN SHIP?
Exploring the Mega Yacht LANA
Super Yacht Secrets! Ever seen this before?
What Does It Take To Transport A Yacht
Explore Luxury on the Water
| HOW DO SHIPS GET FRESH WATER🥤⛴️🌊⚓| #marinerakash #ship #gs #reels #marine #shorts #sea#cargoship

COMMENTS

How Do Yachts Get Fresh Water: Do Superyachts Have Desalination?
Do Superyachts Have Desalination? For those who love luxury and the open sea, owning a superyacht is the ultimate dream. These floating palaces come with alla the bells and whistles of a five-star hotel, including the ability to generate fresh water through desalination. But do all superyachts have this capability? Let's find out. What is For those who love luxury and the open sea, owning a ...
Do Superyachts Have Desalination? (Here's What You Need To Know)
Yes, many superyachts have their own onboard desalination systems. These systems allow them to produce their own fresh drinking water while at sea. Desalination systems can be powered by solar, electric, or diesel power and are typically integrated with other onboard systems like the plumbing and filtration systems.
Freshwater Systems
The freshwater systems on yachts are potable; that is, both the water and the system's components with which it comes into contact must meet the standards for drinking-water quality. In the United States, these are set by the Food and Drug Administration (FDA), so look for tanks, hoses and fittings made with FDA-approved materials, and always ...
Top 5 Reasons Every Mega Yacht Needs a Seawater Watermaker
Discover the top 5 reasons why every mega yacht needs an FCI Watermaker. From unlimited fresh water supply to luxurious showers and extended voyages, enhance your yachting experience with advanced desalination technology.
Everything you need to know about watermakers
Everything you need to know about watermakers. An onboard watermaker will free you from ever worrying again about where your next freshwater stop will be. Andy Pag looks at the latest models available for your yacht. The feeling of autonomy that a watermaker gives a yacht is unique. It transforms that weekend-only cruiser into a go-anywhere ...
Watermakers: a guide to marine desalinators and making water on a boat
A watermaker on a yacht converts seawater into fresh water through a process known as reverse osmosis (RO). A high-pressure pump pushes seawater through a semi-permeable membrane that filters out salt, organics, and bacteria. The fresh water is pumped into your water tanks while the remaining brine bi-product is discharged over the side of the ...
How Do Yachts Get Fresh Water?
How Do Yachts Get Fresh Water? Fresh water is undeniably an essential requirement on any sea voyage, even more so for long journeys on a yacht. This article provides an examination of how yachts maintain an uninterrupted supply of this vital resource while at sea. To learn more about the possible ways to achieve this feat and to get a better understanding of the underlying mechanics involved ...
Liquid Luxuries: The Science Behind Yacht Watermakers
Unlock the convenience of endless fresh water onboard with the science of yacht watermakers. This guide explains how watermakers use reverse osmosis to turn seawater into drinkable water, ensuring you and your guests have a constant supply for drinking, cooking, and bathing, no matter how far you sail. Learn about the various types and sizes of watermakers available to find the perfect fit for ...
5 of the best watermakers: From ERD to high pressure units
Watermakers - technically known as desalination units - use a process called reverse osmosis (RO) to make drinking water. By forcing salty water at a high pressure against one side of an RO membrane, fresh water will slowly seep through, leaving the salt and bacteria behind. The output is notably devoid of minerals, but the taste can be a little strange at first.
How Do Super Yachts Keep Freshwater?
On small boats, a system can be as simple as storing, rationing, and making fresh water on board. Toby Hodges asked 193 skippers on the ARC for their tips, and numerous superyacht captains have volunteered the use of their onboard watermakers to supply fresh water to communities in chaos.
How Do Yachts Get Fresh Water?
Yachts typically have fresh water on board through a combination of storage tanks, watermakers, and shore connections. Freshwater storage tanks are built into the yacht's structure and can hold a certain capacity of water. One of the ways that yachts get access to fresh water is by filling up water tanks when the boat is docked.
Water on board: tips from Atlantic skippers
Bottled water The 193 yachts surveyed on the 2014 Atlantic crossing between them carried more than 27,720lt of bottled water, or an average of 144lt per boat.
Yacht Watermakers
Yacht Watermakers Blue Water Desalination provides a comprehensive range of watermakers tailored to meet the exacting demands of mariners at every level, catering from day fisherman to long-range sailors and transoceanic yachtsmen. Across our extensive product lines, spanning both frame and modular styles, we offer a diverse array of models designed to accommodate various capacities. This ...
Water Makers: Ensuring Steady Freshwater Supply
A water maker is a vital device used on boats, yachts, and other marine vessels to convert seawater into fresh, potable water. This technology has revolutionized long-distance sailing by ensuring a continuous supply of freshwater without the need to rely solely on shore provisions.
Meet the New Class of Freshwater Superyachts Bringing Luxury to Lakes
The new class of luxurious freshwater superyachts resemble their oceangoing cousins, but with expanded design possibilities.
How do yachts obtain freshwater for their needs?
Yachts typically have fresh water on board through a combination of storage tanks, watermakers, and shore connections. Freshwater storage tanks are built into the yacht's structure and can hold a certain capacity of water.
Everything You Ever Wanted to Know About Mega-Yachts (and ...
Mega yachts are generally defined as yachts greater than 100 feet or longer, all the way up to the current largest yacht in the world — AZZAM, which is 180.6 meters long (594 feet). Tell me ...
What You Need to Know About Watermakers
The semi-permeable membranes found on today's watermakers are rated to work in temperatures up to 120F, which means they will do fine in your boat's engine space. The fact that they contain water and are continuously receiving a fresh supply of the stuff when in use only makes them all the more heat tolerant.
Clean, Fresh Water More Than A Luxury On A Large Yacht
The freshwater demands on a large yacht are considerable. Beyond mere drinking and bathing, there's often a need to fill hot tubs and pools, and use them for boat systems and routine deck washing. FCI Watermakers' innovative Neptune series makes from 3,400 - 10,000 gallons of pure, fresh water every day—enough for the most sizable vessel.
How Does Plumbing Work in a Yacht?
Let's start with how the water gets in. Boats have a freshwater storage tank filled with potable water. Only the shower and the sink need fresh water, and both use a pump to draw from this tank as their source. Obviously, the toilet doesn't need to be filled with drinking water, so where does that water come from? The toilet on a boat is either a chemical toilet (something like a nautical ...

How Do Yachts Get Fresh Water: Do Superyachts Have Desalination?

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Do Superyachts Have Desalination? (Here’s What You Need To Know)

Short Answer

What is a Superyacht?

What is Desalination?

What is the Purpose of Desalination on Superyachts?

How Does Desalination Work on Superyachts?

Benefits of Desalination on Superyachts

Types of Desalination Systems Used on Superyachts

Cost of Desalination Systems on Superyachts

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Watermakers: a guide to marine desalinators and making water on a boat

How does a watermaker work?

Marine watermakers: the benefits and drawbacks

More luxuries

No hauling water

A clean, safe water source

More time in remote locations

How much does a watermaker cost?

Ongoing maintenance

Watermaker flushing

Pickling a watermaker

Operating costs

Power consumption

You can’t make water everywhere

Key features to look for

Powered watermakers

Electric or engine drive

AC watermakers

DC watermakers

Engine-driven watermakers

Energy recovery watermaker

Modular, self-contained, and portable watermakers

Modular units

Self-contained units

Portable watermakers

Automatic flushing systems

Automatic Pressure Regulation and adjustable pump speed

Remote control panels

Top watermaker brands

How Do Yachts Get Fresh Water?

Desalination through Reverse Osmosis

Storing and Conserving Water

Maintaining Water Quality

In Conclusion

Yachting Monthly

5 of the best watermakers: From ERD to high pressure units

Best watermaker: ERD units

Schenker Zen 30

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Osmosea units

Spectra Catalina

Best watermaker: High pressure units

SeaWater Pro

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