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**chuckster57** · 10-11-2015, 03:36 PM

There isn't any overflow protection on RV holding tanks, other than the fresh water tank. It sounds like either you have a crack in the tank or the drain going into the tank isn't sealed.

Some drains are glued into the tank and others are pushed into a rubber seal. If yours is the later, then it's possible that overfilling the tank caused enough pressure for the seal to leak.

10-11-2015, 03:36 PM	#3
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,357	There isn't any overflow protection on RV holding tanks, other than the fresh water tank. It sounds like either you have a crack in the tank or the drain going into the tank isn't sealed. Some drains are glued into the tank and others are pushed into a rubber seal. If yours is the later, then it's possible that overfilling the tank caused enough pressure for the seal to leak. __________________ 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.