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Old 02-25-2009, 10:14 AM   #15
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1979 31' Sovereign
Milford , Ohio
Join Date: Jan 2005
Posts: 410
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I know this thread is a few months old but I had to comment on my experience with a broken dump valve.

For me the part that was broken was the square frame piece that is glued onto the outlet of the black tank. Two of the corners that the valve screws go into had broken loose, but were still there hanging onto the screws. That left enough slack in the system to cause a slow drip when the black tank was nearly full.

When replacing both valves, which had leaky internal seals, I was able to repair the broken frame so it could be left in place and reused. I just cleaned both edges of the breaks very well, roughed them up with some fine sandpaper, and then stuck everything back together with some solvent glue that was rated for ABS and PVC pipe. Just to be sure, I let that joint cure for over an hour before reassembling everything.

That was several years ago and no problems since.


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Old 04-07-2009, 09:39 AM   #16
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1979 31' Excella 500
1973 25' Tradewind
Cinnaminson , New Jersey
Join Date: Mar 2006
Posts: 40
Thetford Valve sealant/lubrication
In reassembling thr Black water ank Valve and Discharge, I would usually use vaseline to coat the rubber gasket. I vaguely recall being told "DO NOT USE Vaseline"

Any suggestions

Tom Beitz
6760 PA Unit
Riverton, NJ
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