Head Plumbing and Y-valve

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Dan Corcoran
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Joined: Sun Jan 29, 2017 4:32 pm

Re: Head Plumbing and Y-valve

Post by Dan Corcoran » Mon Aug 17, 2020 11:02 pm

yes?

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Vento Solare
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Joined: Wed Dec 31, 1969 8:00 pm
Location: Newport, RI

Re: Head Plumbing and Y-valve

Post by Vento Solare » Mon Aug 17, 2020 11:50 pm

I replied at 08:51 and answered yes to your question was the problem using a Jabsco joker valve rather than a Raritan. You edited your post at 08:52 and removed the question. The Yes answer stands - Get a Raritan joker valve.

Dan Corcoran
Posts: 142
Joined: Sun Jan 29, 2017 4:32 pm

Re: Head Plumbing and Y-valve

Post by Dan Corcoran » Thu Aug 20, 2020 5:27 pm

Practical sailor magazine lead me to believe all these are equal.
https://www.practical-sailor.com/system ... rine-heads

Other potential clues:
* It only seems to siphon only when set to overboard, and not when set to holding tank.
* The holding tank unexpectedly filled up, perhaps siphoned water into the boat somehow?

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Vento Solare
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Location: Newport, RI

Re: Head Plumbing and Y-valve

Post by Vento Solare » Sun Aug 23, 2020 8:40 pm

You have "pumping" action when the boat is set to overboard as the wave action causes differential pressure. The joker valve is shot - replace it.

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