The original Rainman watermaker was our petrol (gasoline) powered system. In 2014, our first version of this system made the industry ask “Why didn’t someone think of a portable watermaker before this?”
This system required no external power source, so long as you have fuel. It is ideal if you don’t have a generator and need to conserve your battery bank. Not relying on external power gives maximum flexibility for taking it ashore, loaning it out, or using it in emergency situations.
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.
The heart of this system is the Honda GXH50 2.1HP engine, which is the same as that used in their 1kVA generator. It incorporates a tensioned belt drive system where the engine drives both an impeller lift pump and the General Pump high pressure pump. The fuel tank holds 700ml (1.5 pt) and will run for about 70 minutes, depending on fuel quality.
Petrol (gasoline) exists on most boats already, so there is good reason why you may consider using it to power your watermaker. Some of the key benefits of using a separate motor for your watermaker include:
You have three options available for the reverse osmosis (RO) unit, depending on your water requirements, space available, and budget. All three RO options are compatible with the petrol (gasoline) PSU and available in the protective cases. The fuel consumption and sound levels for the PSU are the same regardless of which RO unit is attached, so most customers will choose the High Output RO unit to get the most water made as quick as possible.
Our most common configuration with the AC system due to having the highest output and best overall value. Twice the output of the other options.
A great option if you are physically space constrained. Also common if this is a backup system on a larger vessel as it can be stowed in smaller spaces.
Our entry level water maker system is best suited for those on a budget. It can be upgraded to a high output system at a later date by adding a second membrane.
Related RO weight– High Output: 23kg (51lb)– Compact: 14kg (31lb)– Economy: 11kg (24lb)
Related RO dimensions– High Output: 1,180 x 250 x 130mm (46.5 x 9.8 x 5.1″)– Compact: 690 x 220 x 150mm (27.2 x 8.7 x 5.9″)– Economy: 1,180 x 250 x 130mm (46.5 x 9.8 x 5.1″)
Since the petrol (gasoline) system must be run in a well ventilated area and should not be installed in your vessel, some of the options are not available with this system. One item that can be considered is a hydrotester to give you indication of the total dissolved solids (TDS), so you can know how your membranes are ageing.
Your new Rainman system will arrive with enough spares and consumables to keep you going for a while, so most customers do not need to order more with initial purchase. There are a variety of items you will need over time to keep your system running for many years.
We support our customers with a full stock of watermakers and spare parts in South East Asia carried by our main distributer outlet in Phuket Island Thailand and our partner/ main distributer Marine Supply Asia in their Langkawi Island Malaysia location which is also duty free.
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