Rainman Desalinators

'A COMPACT SYSTEM DESIGNED TO GENERATE A FRESH POTABLE WATER SUPPLY FROM SEAWATER'

A fresh approach to saltwater desalination.

Rainman Watermakers are a compact system designed to generate a fresh potable water supply from seawater. They can be installed in a minimum footprint configuration or kept portable for maximum flexibility.
We use only top quality components in the build process from the best manufacturers: Honda, General Pump, Filmtec, and Noshok. Our filters, membranes and replacement parts are non-proprietary for ease of service worldwide.
SYSTEM TYPES AVAILABLE

You have maximum flexibility in power sources if you wish to keep your system portable. Any of our three platforms can be used as portable. In order of popularity, these include:

AC POWERED
The primary design principle in the AC Rainman is that it must start and run using a Honda 2kVA portable generator. The ubiquity of this generator has helped make it the most popular system in our range. It can also run on a good quality 2kVA inverter. Higher capacity generators and inverters are commonly used as well.

PETROL
An update of the original Rainman, this system can run without any external electricity source. Just add fuel and salt water. We designed this with a Honda GXH50 motor and a simple belt drive system.

12VOLT-DC POWERED
This system was designed with lower power and lower flow rates. Simplicity and low maintenance is retained by utilising a simple triplex plunger pump. Due to the lower productivity and requirement for a shorter power cord, this system is more commonly installed than kept portable.

TWO COMPONENTS – ONE WATERMAKER

The system is made up of a pressure supply unit (PSU) and a reverse osmosis unit (RO). Both parts are required to make a complete watermaker. The PSU lifts the seawater, filters out the sediment and puts the system under high pressure, while the RO unit extracts fresh water from the stream of pressurised seawater. Most of the water goes out to waste as brine output, while about 20% of the volume is extracted as fresh potable water for your tanks. Different RO options exist for you to select with your AC Rainman system, each to achieve their own specific objective.

WHICH MODEL DO I NEED?

To determine the pricing of your Rainman watermaker, consider the pressure supply unit (PSU) on the left column, and the reverse osmosis unit (RO) across the top row, then the price is at that location in the table. Note that the traditional Rainman in the blue case is the same price as the Rainman Naked designed for the minimalist installation. Whilst we do our best to keep stock in our Warehouse in O’Connor, all systems are made in and shipped from Sydney and can be delivered within 7 days from factory order.

PSU Type / RO Unit High Output Compact Economy
AC Electric 1250 watts AU$ 8,340
100-140lph (26-37gph)
AU$ 7,911
50-70lph (13-18gph)
AU$ 7,002
50-70lph (13-18gph)
Petrol (Gas) 1 hr, 700ml, 0.18gl AU$ 10,171
100-140lph (26-37gph)
AU$ 9,742
50-70lph (13-18gph)
AU$ 8,832
50-70lph (13-18gph)
12VDC 32 amps Not
Compatible
Not
Compatible
AU$ 7,656
26-34lph (7-9gph)
Torrent 2800 watts AU$ 17,322
180-230lph (48-60gph)
NA NA
Optional Accessories Price
Control Panel $861
Rainman Autoflush kit $567
Plumbing install kit (included with Naked system) $602
HM Digital COM80 hydrotester $57
Consumables and Spares Price
Prefilter cartridge (5 micron) AU$20
Prefilter cartridges (24 pack) AU$427
Active Carbon Filter for Autoflush AU$20
Impeller replacement AU$50
Pickle solution mix – 1kg (2.2lb) AU$51
40” Filmtec RO membrane AU$534
21” Filmtec RO membrane AU$495
5 metre high pressure hose w/ end cap AU$276
5 metre high pressure hose w/out end cap AU$149
USING THE WATERMAKER

After a few uses, it will take about two minutes to set up your watermaker for use. More detail is available in the operations manual, but the steps are:

  1. Set the systems up. You may choose to leave the systems in a locker and only move the hoses around.
  2. Hook the black high pressure hose from the reverse osmosis case (RO) into the quick connect coupling on the pressure supply unit (PSU).
  3. Put the intake hose into seawater.
  4. Put the green waste brine hose overboard.
  5. Turn the system on.
  6. Slowly pressurise the system to 55 bar (800 psi) using the control valve. Fresh water will begin coming out of the white product water hose.
  7. Let it run for a short period of time, then put it in your tank.
  8. When tank is full, depressurise the system and put it away.
MAINTENANCE REQUIREMENTS

While there is limited maintenance on your Rainman watermaker, there are a few things that should be looked after to ensure a long life of your system.

WHEN STORING THE SYSTEM

  • Fresh water flush and pickle the system when storing it for more than a couple days. This may sound complex, but it is an easy five minute process with no specialist knowledge required.

5-50+ hours of use:

  • Change the non-proprietary prefilter after 5-50+ hours of us, depending on cleanliness of the source water.

1-2 years:

  • Change non-proprietary impeller in the lift pump after a year or two, depending on use.
  • Change the high pressure pump oil each 300 hours of use, using SAE-30 weight oil.

5-10 years:

  • Change the non-proprietary sized reverse osmosis membranes after 5-10 years.
  • If your system starts losing performance, the non-proprietary pump seals may eventually require replacing.

THE RAINMAN ADVANTAGE