
115V / 230V Rainman WATERMAKERS
The most popular model of Rainman Watermaker is the AC model – which uses an onboard power source – such as a generator or inverter – to power the system (refer to the specifications below). This configuration can be ordered in either 115V (Hello to our USA customers) or 230V (Hello to our European / South American Customers).  Don’t hesitate to contact us if you are unsure which power configuration to order.
AC Systems are capable of up to
37 GPH

12V DC Rainman Watermakers
12V DC Systems are capable of up to
9 GPH

Rainman Watermaker
Pressure Supply Unit (Electric PSU)
Two Components – One System
The Rainman Watermaker consists of two components: the Pressure Supply Unit and a set of Reverse Osmosis Membranes. Both are required to make a complete Rainman Watermaker desalination system.
The Pressure Supply Unit is easily selected based upon your power supply onboard – so in this case – AC or 12V. The PSU lifts the seawater, filters out dirt and sediment then puts the system under high pressure for operation. A set of membranes are connected to the PSU to extract drinking water from the seawater  – which is the basic operation of the system.

115V Pressure Supply Unit
Details
- 1.5 HP TEFC induction motor
- 1250 watts steady state power consumption
- Current draw 15 Amps
- Power cord length – 10ft
- 16ft Intake hose with strainerÂ
- Integrated flexible impeller
- 6ft maximum vertical lift above sea level / source water
- GP WMR 316 stainless steel high pressure triplex plunger pump
- Integrated GP 315SS Ceramic relief valve to prevent overpressurisation.
- Sound level – 62dB at 20ftÂ
- Injection moulded polypropylene case
- PSU storage / mounting seat included
PSU Dimensions
- PSU Weight 53lbs
- L23.6″ x H14.8″ x D10.6″

230V Pressure Supply Unit
Details
- 1.5 HP TEFC induction motor
- 1250 watts steady state power consumption
- Current draw 15 Amps
- Power cord length – 10ft
- 16ft Intake hose with strainer
- Integrated flexible impeller
- 6ft maximum vertical lift above sea level / source water
- GP WMR 316 stainless steel high pressure triplex plunger pump
- Integrated GP 315SS Ceramic relief valve to prevent overpressurisation.
- Sound level – 62dB at 20ft
- Injection moulded polypropylene case
- PSU storage / mounting seat included
PSU Dimensions
- PSU Weight 53lbs
- L23.6″ x H14.8″ x D10.6″

DC Pressure Supply Unit
Details
- Permanent magnet TEFC DC motor
- 410 watts steady state power consumption
- Current draw 30 Amps
- Power cord length – 4.5ft – Anderson
- 16ft Intake hose with strainer
- Integrated flexible impeller
- 6ft maximum vertical lift above sea level / source water
- GP WMR 316 stainless steel high pressure triplex plunger pump
- Integrated GP 315SS Ceramic relief valve to prevent overpressurisation.
- Sound level – 58dB at 20ft
- Injection moulded polypropylene case
- PSU storage / mounting seat included
PSU Dimensions
- PSU Weight 53lbs
- L23.6″ x H14.8″ x D10.6″

Rainman Watermaker
Membrane Options
Two Components – One System

High Output Membranes
Details
- Â Compatible With 115V / 230V System
- NOT Compatible With The 12V DC System
- Produce Up To 37 Gallons Of Drinking Quality Water Per Hour.
- Desalinate Sea, Brackish and Fresh waterÂ
- Twin 40″ Dupont Filmtec Membranes
- Robust Polyethylene Case
- 10ft Brine Discharge Hose
- 10ft Product Water Hose + 33ft Extension
- 16ft High Pressure hose (PSU connection)
- Length – 46.6″
- Depth – 5.1″
- Height – 9.8″
- Weight – 52lbs
- 2 Year Rainman Warranty
- Preffered Seatask SupportÂ

COMPACT MEMBRANES
Details
- Â Compatible With 115V / 230V System
- NOT Compatible With The 12V DC System
- Produce Up To 18 Gallons Of Drinking Quality Water Per Hour.
- Desalinate Sea, Brackish and Fresh water
- Twin 21″ Dupont Filmtec Membranes
- Robust Polyethylene Case
- 10ft Brine Discharge Hose
- 10ft Product Water Hose + 33ft Extension
- 16ft High Pressure hose (PSU connection)
- Length – 27.2″
- Depth – 5.9″
- Height – 8.7″
- Weight – 32 lbs
- 2 Year Rainman Warranty
- Preffered Seatask Support

ECONOMY MEMBRANES
Details
- Â Compatible With 115V,230V and 12V System
- Compatible With The 12V System up to 9GPH
- Produce Up To 18 Gallons Of Drinking Quality Water Per Hour.
- Desalinate Sea, Brackish and Fresh water
- 40″ Dupont Filmtec Membrane
- Robust Polyethylene Case
- 10ft Brine Discharge Hose
- 10ft Product Water Hose + 33ft Extension
- 16ft High Pressure hose (PSU connection)
- Length – 46.6″
- Depth – 5.1″
- Height – 9.8″
- Weight – 23lbs
- 2 Year Rainman WarrantyÂ
- Preffered Seatask SupportÂ
FEATURED VIDEO
Thank you to our customers for taking the time to send in and record there experiences with there Rainman Watermakers!
Rugged and Robust
Rainman Watermakers are solid and robust portable desalination systems – designed for the rigors of the maritime environment and built with ingenuity, with the most popular of the systems needing nothing more than a small portable generator to operate, and our gasoline systems being completely independent, and backed by the global and prestigious Rainman and Honda warranty. Check out the videos below to see out most popular portable desalination systems in action and why you too will love the Rainman Watermaker System.
Sea…
Brackish and Fresh

Less Than 10 Minutes

Can I Install A Portable System? Can I Do Both?
Do I Have To Buy Spares Through A Dealer?
What Is The Maintance Required on A Rainman System?
- Â 5-50 Hrs – Prefilter Change
- 1-2 Years – Impeller & Oil Change
- 5-10 Years – Membrane and Packings Change