3/4 full light came on in rapid fashion. Should have been almost empty. Before I realized what was happening the tank filled entirely with sea water. I was able to stop it by shutting off the two through hull fittings that feed the Galley Maid pumps to the V berth and guest heads.
What's going on here is there an internal check valve inside one of the pumps gone bad ?
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Yesterday 11:33 PM #1Senior Member
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Holding tank filling with sea water !
1986 54 Hatteras MY IOLANI
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Yesterday 11:52 PM #2Senior Member
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- Jun 2012
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Re: Holding tank filling with sea water !
You may have a copper line that connects the priming plug holes to one another. This is done to avoid loss of prime issues. However it will fill your holding tank and is usually only used if discharging directly overboard .
JMooney
61 MY 1983 #341
“Jerrie”
Miami , FL
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Yesterday 11:56 PM #3Senior Member
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- Jan 2023
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Re: Holding tank filling with sea water !
Thanks I will check that at sunrise. Midnight here I'm just glad I got it stopped at this point.
None of the valves were repositioned since last season and it worked just fine it would take a couple weeks to fill the tank and call the pumper boat.
Just looking at the install diagram could it be a vented loop issue and a siphon occurring ?Last edited by IOLANI; Today at 12:01 AM.
1986 54 Hatteras MY IOLANI
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Today 12:20 AM #4Senior Member
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- Apr 2005
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Re: Holding tank filling with sea water !
Without knowing the exact design of your installation, I'd check the vented loop first. Perhaps the vent hole or hose is clogged, allowing a siphon condition to exist.
Everyone should believe in something - I believe I will go fishing - Henry David Thoreau
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Today 12:26 AM #5Senior Member
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