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Old 06-21-2014, 09:52 AM   #1
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gray water backup

had a kitchen sink backup taht was solved by emptying gray water tank but i have a question on how the drains are connected since the bathroom sink nor the floor drain backed up and both are lower than kitchen sink
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Old 06-21-2014, 01:42 PM   #2
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HEPVO valve

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had a kitchen sink backup taht was solved by emptying gray water tank but i have a question on how the drains are connected since the bathroom sink nor the floor drain backed up and both are lower than kitchen sink
All drains have a HEPVO valve instead of the conventional goose neck trap. So my guess is as you tried to drain a sink water it filled the pipes and would not drain. The HEPVO valves in shower and bath sink prevented a backup in those areas.

Hepvo Waterless Valve
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Old 06-21-2014, 01:59 PM   #3
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question solved

Thanks
As a newbie this forum is a great resource
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Old 06-21-2014, 04:07 PM   #4
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Originally Posted by Boxster1971 View Post
All drains have a HEPVO valve instead of the conventional goose neck trap. So my guess is as you tried to drain a sink water it filled the pipes and would not drain. The HEPVO valves in shower and bath sink prevented a backup in those areas.

Hepvo Waterless Valve
Wish I'd have known about this before. We don't need to pour RV antifreeze down each drain when winterizing to displace water in a p-trap, just down one drain to get enough antifreeze into the gray tank to protect the seal on the dump valve.

The forums are a great resource for not-so-newbies, too!
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