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**chuckster57** · 08-27-2016, 05:33 PM

Bad seals could be the issue too. There are 3 (I think) different types and they are NOT interchangeable. You can use Bladex on regular valterra valves but not the other way around. Also Bristol valves have to have Bristol seals.

Try filling your tank with clear water. Then operate the valve fully a few times. If it doesn't stop, then the seals need tone changed.

08-27-2016, 05:33 PM	#3
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,319	Leaking black tank valve Bad seals could be the issue too. There are 3 (I think) different types and they are NOT interchangeable. You can use Bladex on regular valterra valves but not the other way around. Also Bristol valves have to have Bristol seals. Try filling your tank with clear water. Then operate the valve fully a few times. If it doesn't stop, then the seals need tone changed. __________________ 2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel. Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS. Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.