Rainman Autoflush


Your Rainman watermaker is a very robust piece of equipment, but caring for certain aspects will prolong the useable life. If seawater is left for too long in your watermaker, planktonic organisms will die and rot. This can eventually damage the reverse osmosis (RO) membranes in your watermaker.


Our normal guidance is that if you are leaving your system for more than a day or two, you should flush the seawater out of the system with fresh water. After another week, you either need to fresh water flush the system again, or pickle the system for longer term storage by adding a biocide to the fresh water flush. While this is a very simple process to execute, it is also one of the tasks that many customers prefer to have automated. Many people that have installed their Rainman watermaker prefer to have the system flushed weekly instead of pickling their system. Our Autoflush System is designed to ease the burden of remembering to perform this flush.

The Autoflush System incorporates a solid state timer, a motorised valve, and an activated carbon filter to allow your boat’s fresh water supply to push fresh water from your boat’s tanks through your watermaker for a few minutes every seven days. The one button programmable timer can be set between two and eight minutes flush cycle duration, depending on how strong your boat’s water pump is. The activated carbon filter will neutralise chlorine that may be in your tank from municipal water sources.

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