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 !

optional equipment

Brass / Stainless pump +$349.00

If you don't like the Karcher pressure washer pump then you can upgrade to this pump at any time, the cost is the same. You will get a 2 year warranty and  included is an overhaul kit at no charge. You will need to replace the oil after the first hour of operation. Any motor oil you happen to have will work fine. Like all pumps, the unit ships with a sealed oil filler cap to prevent oil spills during shipping. Please remember to replace the oil filler cap with the vented cap. 

Stainless Pump and 1 HP Stainless steel Motor Dual Voltage (115 -230 volts) BOTH for $999.00 !!

You asked for it - You got it !!

Take advantage of this price, you will not find it anywhere !!

*Machined super thick ceramic plungers.

*100% 316L Stainless steel bolts.

*Anticorrosive coated aluminum casing.

*Forged and heat treated crankshaft.

*Conical ball bearings for quiet and lower crankcase temperatures.

*316 stainless valve seat and valve stem.

*Triple oil seal for durability.

*Stainless steel connecting rods.

*Blow-off safety valve.

Motor Specs.


  • - High quality powerful Marine Motor splash proof seals.
  • - 56C face direct mounting
  • - Easy wiring access
  • - UL Listed and meet any Nema Standard and CE for Europe exports.

 1HP . 1725RPM . SF 1.15 . 56C Frame . TEFC . 115/230V 

Product Size: 13”x10”x10” G.W: 27 lb  

Dow filmtec SW30-2540 membrane +$39.00

The membrane included in the kit is made by Toray South Korea and works great. If you prefer Dow filmtec made in USA add $39.00 to the kit price. Please let me know if you want the membrane pre-installed or left in the sealed vacuum bag for you to install at a later date.

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, it is a game changer. You no longer have to plan your trips around water.

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. Using a small Honda generator you will make ~110 gallons of water with 1 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 our watermaker kit.  

Registration / Order form

To order or ask a question, please submit the form below. If you are ready to order please specify the options and I will email you a secure link to pay on-line or call 602-751-6414.

SeaWater Pro LLC

37 Hendricks Isle, Fort Lauderdale, FL 33301


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. I have a 20 psi 12 volt priming pump included with the kit and an optional 5 psi at 120 volts magnetic submersible for an aditional $124.

How many watts is the high pressure pump ?

The Karcher pump draws about 900 watts, 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

Where should I install the membrane ?

The membrane can be mounted horizontal or vertical. Regardless which brand watermaker you decide to purchase, due to the organic nature of all membranes they cannot be installed next to a hot engine. Also, the air-cooled pumps may overheat if operated in a hot engine room. The only pump that can handle heat is the watercooled Karcher model K 3.540, which I offer as an option with the kit for another $100. Check out the watercooled pump here.  http://a.co/9ER4KkF 

What skills and tools are required to assemble the kit ?

This is not rocket science.

You will need to add teflon tape to the plastic threaded fittings and some very basic tools. 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. 

How can I upgrade to a stainless pump ?

You can always upgrade to a stainless pump because the rest of the system is the same. If for some reason you don't like your Karcher pump simply remove it and connect a stainless pump.

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 made by General, AR or CAT. In the two years using Karcher pumps we've lost only one. A quick rinse after every use will help extend the life of any pump. The Karcher advantage is the $89 replacement cost, the 2 year factory warranty and the fact that you can find them anywhere makes them priceless.

How much is a replacement membrane ?

Being that we use standard size membranes they cost 5 times less than custom propriatery sizes. We offer 40 inch replacement membranes for $195.00 plus shipping. You may search for SW30-2540 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 on the primer pump pressure gauge then it is time to replace your filters or rinse them. 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.

  Pleated Sediment Water Filter Cartridge 10"x2.5" Standard Size 


Tier1 S1 20 Micron 10 x 2.5 Pleated Cellulose Sediment Pentek Comparable Replacement Water Filter 12 Pack 


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.