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Old 07-16-2018, 07:46 PM   #1
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City: Alamitos Bay Marina
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Watermaker Fresh water flush-

Have had our water maker for about 18 years now, just replaced the membrane and notice on the booklet that is said to fresh water flush at low pressure only.

So my question is how long does everyone run there fresh water flush and are you backing your pressure down the 700-900psi down to 0 when you do flush.

This is different then what I have been doing and what my original manual suggests. Last membrane lasted me about 10 years.
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Old 07-16-2018, 08:01 PM   #2
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Don’t know, mine auto back flushes every 7 days.
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Old 07-17-2018, 12:54 AM   #3
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I have an FCI watermaker and the manual states that the high pressure valve should be open (no pressure) when flushing with fresh water. It runs for a minimum of 5 minutes and can be set to run longer.
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Old 07-17-2018, 10:27 AM   #4
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The Village VMT unit I have specifies low pressure flush.
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Old 07-19-2018, 03:25 PM   #5
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at the average domestic pressure on most boats 3 minutes is fine. Note you will see water on the product side of the water maker as even at domestic pressure you will have transfer across the membrane.
BPR valve should be backed off completely - no pressure.
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