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**chuckster57** · 11-27-2014, 07:42 AM

Welcome to the forum

Mis labeled valves is one possibility, and it seems more common than not. If your sure the valves are labeled right, then it's possible that the vent line may be inserted to far into the tank.

Once the water level reaches the vent line, it will take the path of least resistance. Your toilet is at a much lower elevation than the top of the vent.

11-27-2014, 07:42 AM	#4
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,313	Welcome to the forum Mis labeled valves is one possibility, and it seems more common than not. If your sure the valves are labeled right, then it's possible that the vent line may be inserted to far into the tank. Once the water level reaches the vent line, it will take the path of least resistance. Your toilet is at a much lower elevation than the top of the vent. __________________ 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.