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Motor31 · 10-27-2008, 10:38 AM

It has to be a check valve in the lines that stops flow from the lines to he tank. My guess is it has to be in the area of the pump. There should be a one way valve to prevent flow backwards into the tank from the pump. Try running the pump a bit and see if it seals up again.

I had a situation last summer that had me scratching my head. I keep the fresh water at 1/3 tank. I went to fill it since we were going to be dry camping a while and found the tank to be full and I had no recollection of filling it. Since we were in a park with full hookups I had no reason to fill the tank before that time. I was wondering if a bit of grit got into the valve and propped it open. It has not happened since.

10-27-2008, 10:38 AM	#2
Motor31 Senior Member Join Date: May 2005 Posts: 2,130	It has to be a check valve in the lines that stops flow from the lines to he tank. My guess is it has to be in the area of the pump. There should be a one way valve to prevent flow backwards into the tank from the pump. Try running the pump a bit and see if it seals up again. I had a situation last summer that had me scratching my head. I keep the fresh water at 1/3 tank. I went to fill it since we were going to be dry camping a while and found the tank to be full and I had no recollection of filling it. Since we were in a park with full hookups I had no reason to fill the tank before that time. I was wondering if a bit of grit got into the valve and propped it open. It has not happened since. __________________ Mike Nancy and the fuzzies Fulltiming since June 2004 Volvo 660 MH tow vehicle 2005 MS 38RL 2007 Saturn Ion "toad" 2010 Gold Wing "piggyback"