Welcome to SeaWater Pro

Plug and Play watermaker

This video describes what is included in the kit. Happy buyer guarantee !

If you are not completely satisfied with the unit return for a full refund ! NO QUESTIONS ASKED !

About Us

Quality Components

We own the machinery and make most parts in house with 20 years in the machining business. The RO system is entirely built out of stainless, brass and plastic parts.

Non Proprietary Parts

All components including filters and membrane can be found at your local hardware store on any on-line outlet.

Complete System 21-GPH for $1495 US !!!

At 21 Gallons (80 liters) per hour only $1495, we have NOT found a more competitive pricing anywhere. If you do please let us know. Priority mail 3-5 day shipping anywhere in the US including territories $119.00.  Permeate flows for individual membranes may vary +/-20% due to temperature and other factors. 

Get off the grid

The average sailing vessel runs out of water way before it runs out of fuel. In the Bahamas you will pay 35 cents / gallon for the precious liquid yet almost 75% of our planet is covered with it.

Once you own a watermaker there is no going back.

Shower all you want, wash your boat deck and drink chemical free water with less dissolved solids than tap water. 

The system can operate on a Honda EU2000i portable generator and spare enough power to charge your batteries at the same time. Make 110 gallons of water with a single gallon of gas.

It will also run from a 12 volt battery using a DC power inverter.

Now can be enjoyed not only by the Mega-yacht crowd, but by the average cruiser.

The system is 100% assembled with non proprietary "off the shelf parts" making maintenance a breeze.

The system is assembled in Fort Lauderdale Florida and you may call anytime with questions.

The cost is 50% less than the competition due to our manufacturing abilities therefore bypassing the middleman on some components. Shop around, nobody can beat our price. Read testimonials about what existing owners have to say about the watermaker.  

Registration / Order form

To order or ask a question, please submit the form below.


Call 602-751-6414 anytime for support

Frequenly Asked Questions

How many watts is the priming pump ?

The priming pump draws less than 100 watts.

How many watts is the high pressure pump ?

The Karcher pump draws about 900watts, the watercooled karcher about 1000 watts at 800 psi. The watercooled option adds another $100 to the kit price. Check it out here.  http://a.co/9ER4KkF

Can I install the system in my engine room ?

Regardless which brand watermaker you own or decide to purchase, the organic nature of all membranes have a maximum operating temperature of 113 degrees fahrenheit (45C).

However the watercooled Karcher model K 3.540, is a great option and the only pump that can handle engine room temperatures. The membrane should not be installed next to a hot engine. Check out the watercooled pump here.  http://a.co/9ER4KkF

What skills and tools are required to assemble the kit ?

1. You will need to add teflon tape to the plastic threaded fittings. Some fittings already have teflon tape, however, they may still need to be tightened. Every installation is unique therefore be prepared to turn a wrench. I hope you understand, call if you need help.

2. You will need a 5mm allen wrench, a 5/8 socket and a crescent wrench.

How can I upgrade to a stainless pump ?

I choose not to market these pressure washer pumps simply because they are not cost-effective. That means WHEN they break they cost more than using inexpensive $100 Karcher pressure washers.

You may purchase the pump and motor direct and I can send you the rest of the watermaker parts without the Karcher pump for $1395.

This is the pump most watermakers use,


Here is the motor you will need

What are the shipping charges ?

It takes about 5 days to prep your kit for shipment, then UPS or Priority mail 3 to 5 days anywhere in the US including territories for $119.00. International Orders vary depending on your country. 

How long does the membrane last ?

It is recommended that you clean your reverse osmosis membrane as needed or once every two years (on average). The reverse osmosis (R.O.) membranes last an average of five years and with proper operation and care can last up to 10 years. Permeate flows for individual membranes may vary +/-20% due to temperature and other factors.

How long will the Karcher pump last ?

Almost all watermakers use pressure washer pumps. In the two years using Karcher pumps we've lost only one. A quick rinse after every use will help. The advantage here is the $89 replacement cost, the 2 year factory warranty and the fact you can find them anywhere.  If you still don't like it or you require 24/7 operation then choose the stainless pump.

How much is a replacement membrane ?

Being that we use standard size membranes they cost 5 times less than special sizes. We offer 40 inch replacement membranes for $195.00 plus shipping. You may search for SW-2540 online and compare prices, we have the lowest price membranes on Amazon.

How long do the pre-filters last ?

Depends on the water quality, from a few days to a few months.

If you notice a pressure drop of more than 5 psi on the primer pump pressure then it is time to replace your filters. Also, if they look green or black or some other non appetizing color then consider the same.

Where do I find pre-filters ?

Ideally you need a 20 micron and a 5 micron. You may purchase them online for about $5 / each. In an emergency use anything available at your nearest hardware store and don't worry about microns. We used 10 inch filters because it is  the most common size filter.

Ebay versus Direct buy.

The $1495 plus shipping price is available when you buy direct by calling or register above and save $100.

Ebay is another great place to purchase a watermaker after auction fees and buyer protection the price is $1595.00 plus shipping.