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Old 05-07-2013, 07:46 PM   #1
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Location: Union City, Ca.
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Water bypass valve for M.H.

I have a 1997 36' Dolphin M.H with a on board 80 Gallon fresh water tank thats located under our bed.
As of late (our last outing) I travel with a half of tank of water.
When we were at a camp site and connected to their water system it wasn't more then a week or so that I went under the bed to retrieve some supply's when I notice that my water tank was all most full.
I checked the valve in the compartment to see if I had left the full tank lever in the fill Position which it was not.
I realized that the valve was leaking city water into the tank.
There is a lot of work to replace the valve so I was thinking that if I was to install a on and off valve in the line going into the water tank itself does anyone of you think that this would be a good solution?
Of course I would have to turn it by hand every time I wanted water put into my tank. which I do now anyway.
Any comments would be greatly appreciated.
Terry Walter

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Old 05-07-2013, 08:03 PM   #2
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You have to consider the posibility that the 12v pump is leaking internally and doing the filling .

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Old 05-07-2013, 10:19 PM   #3
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That sounds like a possibilty oxcept I installed a new water pump a couple of years ago.
I can see the water coming out of the hose that goes into the top of the water tank and if it was comimg from the pump it would be comimg in at the bottom of the tank and I would not be able to see it.
Just a thought.
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Old 05-08-2013, 05:09 AM   #4
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A 1/4 turn ball valve, installed as you said sounds like a workable solution. It means turning 2 valves instead of 1, is the only difference.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
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Old 05-08-2013, 05:12 AM   #5
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Mine did that. I opened/closed the fill valve a bunch of times. Was fine. Musta been a bit of something in it.
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Old 05-08-2013, 06:07 AM   #6
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Ours did the same! Found the park water pressure was VERY high which "pushed" water past the fill tank valve. Get a good Watts pressure reducer and my bet is that the "problem" will go away.

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