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  1. 10-13-2021, 02:36 PM #21
    DNestor
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    Depends on the valve system. On my original valve I had separate city and pump positions. The valve closed off the tank. On my new valve city and pump are the same position so a check valve is used.


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  2. 10-13-2021, 05:25 PM #22
    powerscol
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    Quote Originally Posted by carnolddsm View Post
    The water pump serves two purposes. One is obvious, to pump water. The second not so obvious, when connected to city water the pump acts as a check valve to prevent water from going to the water tank.

    Your pump is allowing water into the the tank. The fix is to replace the pump.
    Why replace the pump when you can add an external check valve
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