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Old 03-07-2022, 01:55   #1
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Join Date: Feb 2009
Location: Sydney, Australia, Cruising Greece in the summer.
Boat: FP Lucia 40, Hull #22
Posts: 455
Watermaker (Aquabase)

Hi All
For some time I have been puzzled as to why sometimes there would be a trickle of water out of the through hull discharge. At first I thought it may be residual pressure but eventually got around to chasing it down.

The following is an excerpt from the SDLC installation guide.
The produced water pipe (F) is connected to the upper part of the tank and should not touch the water.
Donít put a valve on this production pipe (because there is no rise in pressure); if a valve is installed on this tank, then it must be
always open (water must be able to pass freely into the tank).
Do not immerse the piping into the tank to avoid a "siphon" effect
when stopping the watermaker."

Well, water was siphoning back from the tank and it turns out the fitting used was for an extraction hose. it had a barb fitting that extended about 100mm into the tank so when full the top 100mm was free to drain slowly out!
5 minutes with a hack saw fixed that! If you notice any "dribble"have a look at the tank fitting.
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MKB53 is offline   Reply With Quote

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