Petrol – Compact 50-70 lph

Petrol – Compact 50-70 lph


High Pressure Pump

  • Honda GXH50 50cc, 1600W (2.1 hp)
  • Dimensions: Length 595mm (23.4″), Width 310mm (12.2″), Height 450mm (17.7”)
  • Weight: 26.5kg (58.3lb)

Compact RO Membrane

  • Fresh Water Production: 50 – 70 litres per hour
  • Dimensions: Length 690mm (27.2″), Width 150mm (5.9″), Height 220mm (8.7”).
  • Weight: 14.5kg (32lb).


Pressure Supply Unit – Petrol (PSU-E) 


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 polyethylene 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 relief valve to prevent overpressurisation and allow for pressure washing.
  • 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 or pressure washer gun.
  • 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.
  • Can be coupled with optional pressure washer gun.
  • Dimensions: Length 595mm (23.4″), Width 310mm (12.2″), Height 450mm (17.7″)
  • Weight: 26.5kg (58.3lb)


Our most compact RO system is compatible with either the petrol (gasoline) or electric pressure supply units. It is ideal for use with boats that are very space constrained.

  • Two 21″ Dow Filmtec RO membranes will produce 50 to 70 litres per hour (12 to 16 gph) with our pressure supply unit, depending on water temperature.
  • All salt water plumbing is 316 stainless steel.
  • Quality fluid filled pressure gauge.
  • 316 stainless steel pressure valve for long life.
  • Rugged polyethylene case.
  • Sturdy handle to ensure ease of carrying.
  • 3 metre (10 ft) input hose with quick fit connector for connection to pressure supply unit, won’t mark your deck.
  • 3 metre (10 ft) food grade polyurethane fresh water delivery hose.
  • 10 metre (33 ft) food grade polyurethane extension hose for reaching your forward water tank.
  • 3 metre (10 ft) brine waste hose.
  • Dimensions: Length 690mm (27.2″), Width 150mm (5.9″), Height 220mm (8.7″).
  • Weight: 14.5kg (32lb).
  • This is effectively an shortened version of the 40″ High Output RO Case.
  • New: For customers wishing to install the membrane unit without using the external case, we now offer a “Rainman Naked” option that includes all the internals of this RO option without the case.