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
Rainman Watermakers are also available in a 12V DC format – these portable watermaker systems are ideal for vessels looking for low output, and a very low power consumption. Ideal for running on  wind/solar supplemented battery bank.  If running on batteries alone, we recommend at least a 400 amp-hour bank to operate this system.
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
115V Rainman systems are designed to operate drawing around 12 amps – around 1250 watts steady state power consumption. A generator as small as a Honda EU2000i will work for this system
Details
Technical Specifications
- 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
230V Rainman systems draw approx 6 amps – around 1250 watts steady state power consumption. A generator as small as the Honda EU20i will work for this system. Your preferred plug can be selected upon order.
Details
Technical Specifications
- 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
12V DC systems require around 30 amps to operate – around 410 watts. The Rainman system is ideal for folks wanting to avoid the complexities and maintenance of more efficient energy recovery systems.
Details
Technical Specifications
- 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
The Reverse Osmosis Membrane is ‘Part Two’ that will complete your Rainman Watermaker Desalination System.
Membrane selection is a combination of size and product water requirements.
The membranes are available in three options: Economy, Compact and High Output. The intentional naming of the membrane options represent the selection characteristics
The membranes recieve the high pressure water from the Pressure Supply Unit and, using reverse osmosis, extract the drinking water from the seawater.
The membranes will produce two ‘output’ streams – the first will be the ‘Brine’ or ‘Waste water’ – which you will discharge back into the ocean – this is simply the same water that came in to the system – minus some pure water molecules.
The second stream the membranes produce is the ‘permeate’ or ‘fresh water’ stream. This is the output that we commonly refer to as ‘product’ water, and is comparable in quality to bottled or distilled water. You will place this product water hose in your fresh water tanks and leave to fill.
High Output Membranes
26 – 37 GPH
The high output membrane is the flagship model – designed specifically for the Rainman Electric  Pressure Supply Units. With the High Output Case, you can expect to produce between 26 – 37 GPH. This is our most popular and highest output option.
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
13 – 18 GPH
An ideal companion for the electric PSU if you are short on space, and do not require the higher output that the High Output membrane provides. This compact case, together with the Rainman Electric PSU is capable of producing between 13 – 18 Gallons Per Hour.
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
13 – 18 GPH (7-9 GPH Â for 12V System)
The most economical companion to the Electric PSU. With the Economy Membrane, you can expect production rates between 13 – 18 Gallons Per Hour*. This is also the only membrane compatible with the 12V DC Rainman system (*7-9 GPH at 12V)
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
All Rainman Watermakers are equip with a brackish and fresh water flow gauge that allows the use of the system in both Sea, Brackish and Fresh water sources – allowing you to take your system wherever your adventure leads you.
Less Than 10 Minutes
The Rainman Watermaker – portable configuration – comes ready to operate out of the box. With the first time set up of your portable desalination in as little as 10 minutes, you can benefit from a fully functional, and extremely robust portable desalination system right away – without the cost, downtime or complexity of installation.
Can I Install A Portable System? Can I Do Both?
Yes! Portable systems can easily be converted to an installation system, and vice versa. The blue shells detach, and the plumbing components can be sourced in the parts store. You can also purchase the system as an installation system
Do I Have To Buy Spares Through A Dealer?
No! The Rainman Watermaker system uses components that are compatible with many other brands – and the sizing of the membranes and filters are common size – which means that you can source from various marine stores globally.
What Is The Maintance Required on A Rainman System?
All systems onboard require maintance – your watermaker is no exception. A full guide comes with your system – but as a rule of thumb:
- Â 5-50 Hrs – Prefilter Change
- 1-2 Years – Impeller & Oil Change
- 5-10 Years – Membrane and Packings Change