Quote:
Originally Posted by Bechard
The RV service manager believes my issue is the backflow membrane in the pump.
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Yes, that sounds right to me. All water pumps have a non return valve in them. That is how they maintain the pressure in the lines when the pump is off and that pressure is used to turn the pump off. Also, that non return valve stops the city water from flowing backwards through the pump into the FW tank. There should also be a non return valve between the city water inlet and the pump outlet so that when the pump is operating it doesn't pump water out of the city water inlet.