Detailed Rainman Watermaker Schematic

We have designed the system to be as simple as possible for maximum reliability and easy maintenance.

  1. Optional installation helps both cost effectiveness and ease of future maintenance
  2. No electronics to fail or corrode
  3. No generator required for the petrol version means you don’t need to run the main engine to operate our system

Schematic Explained.

  1. An impeller lift pump draws sea water up to the pressure supply unit and creates positive pressure for the high pressure pump.
  2. The pre-filter removes particulates larger than 5 microns from the water.
  3. A plunger pump pressurises the system for the reverse osmosis membranes to operate.
  4. The relief valve only opens if the control valve is closed excessively or a pressure washer gun is attached and idle.
  5. A high pressure hose carries filtered sea water to the reverse osmosis membranes.
  6. Multiple membranes are connected in series (double RO membrane case configuration).
  7. The pressure control valve at the end of the system is used to set system pressure to approximately 55 bar (800 psi).
  8. Brine water is released to the sea while fresh water is routed to your drinking water tank.
  9. Both the lift pump and high pressure pump are powered by either a reliable Honda 50cc engine or a fully sealed induction electric motor.