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Old 05-28-2015, 01:33 PM   #1
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Posts: 18
Grey Water Dump Valve Fiasco - Advice Needed!

Hello all - i've been noticing an increasing drip from my grey water tank plumbing above the dump valve but below the tank. Turns out that several joints were cracked and the 1.5" pipe off of the tank reducer (connected to the tank itself) was severely split. I could not remove the tank reducer and was worried if I tried to cut it out I would irrecoverably damage the tank leading to much $ to repair. I have rigged up a fernco rubber coupling on the outside of the tank flange which seems like it will be ok. I had to order a new spigot flange to attached to the dump valve as the old one was glued to the old pipe and also cracked. I got it today (Valterra T-1006) but the seals from my old dump valve don't fit. I ordered an entirely new valve which will arrive tomorrow (a Valterra T-1001VP). Am I crazy that my older dump valve has a seal that is 1/16th inch smaller?? I thought they were universal. The four screw holes on the bracket all line up. Are there different flange/seal combinations I am unaware of? Any advice would be greatly appreciated.

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Old 05-31-2015, 11:42 AM   #2
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Join Date: Jan 2012
Location: Cincinnati
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It sounds like there's movement between the tank and the mounted valves. Make sure this movement is found and corrected. There could be differences in valves and gaskets, it's best, especially when replacing parts, to make sure they are all the same size. When in doubt, replace the whole package, they aren't that expensive compared to failure of the components.

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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advice, water

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