Gas Pressure Supply Unit


Rainman Watermaker – Petrol (Gasoline) Pressure Supply Unit

Rainman Watermaker
Petrol (Gasoline) Pressure Supply Unit


  • Our original petrol (gasoline) version of the pressure supply unit perfect for boats with 12V electrical systems or people using the system off grid.
  • Sturdy shell with removable front hatch for easy access.
  • Honda GXH50 50cc, 1600W (2.1 hp) petrol (gasoline) powered engine.
  • Pre-filter and housing externally mounted for ease of service.
  • Jabsco impeller pump to lift water and provide positive pressure to the high pressure pump.
  • General Pump WM series 316 stainless steel high pressure pump, the workhorse of the RO industry.
  • General Pump 316SS/ceramic relief valve to prevent over pressurisation
  • Sturdy 3 metre draw hose fitted with one way valve so it remains primed, with detachable strainer.
  • High pressure stainless steel quick couple outlet for connection RO membrane unit
  • Five 5 micron pleated paper pre-filter cartridges included.
  • 1kg (2.2 lb) bag pickling solution powder included.
  • Couples with one of our reverse osmosis membranes, ordered separately.
  • Can also be coupled with RO membranes from other suppliers.
  • Dimensions: Length 595mm (23.4″), Width 310mm (12.2″), Height 450mm (17.7″)
  • Weight: 26.5kg (58.3lb)



50 to 70 litres per hour (13 to 18 gph)
Length 1,200mm (47.2″), Width 100mm (3.9″), Height 100mm (3.9”)
Weight: 11.0kg (24lb).


50 to 70 litres per hour (13 to 18 gph)
Length 690mm (27.2″), Width 150mm (5.9″), Height 220mm (8.7”)
Weight: 14.5kg (32lb).

High Output

100 to 140 litres per hour (26 to 37 gph)
Length 1,180mm (46.5″), Width 130mm (5.1″), Height 250mm (9.8″)
Weight: 23.5kg (52lb).
*Please note: Prices do not include applicable shipping fees taxes or duties.