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Old 01-01-2013, 08:16   #1
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Location: Boat home port Indiantown Fl Crew central Ohio
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Watermaker osmosis draw-back

When shutting down your watermaker you get a small amount of
permeate draw-back from from natural osmosis. How do you prevent air from being drawn into the permeate side of the membrane? Do you use
a draw-back tank as Dow suggusts or a check valve in the permeate line.
I built a 40 GPH watermaker and it is GREAT! Do it! After filling my tanks I connect a 1/2" hose to the permeate discharge and rinse the dodger ,
fishing gear , or do laundry on deck directly from the watermaker.
After shutting down , I have had 8' of water in this line drawn back to the membranes. What do you do? Thanks Steve
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Old 01-01-2013, 08:28   #2
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Re: Watermaker osmosis draw-back

Dunno for sure but how about running fresh water into intake a moment before shutting down..
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Old 01-01-2013, 09:17   #3
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Re: Watermaker osmosis draw-back

Greetings and welcome aboard the CF, Steve.
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

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osmosis, watermaker

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