Forum Discussion
Old-Biscuit
Jan 14, 2015Explorer III
Harvard wrote:
Turn off the city water supply and pressure up your system with the water pump. With all water taps OFF if the pump cycles on and off you probably have the stated check valve in the water pump problem.
Or cold be 'fill valve' leaking thru as it also has pressure against it with pump ON.
Easy check........disconnect pump suction line and see if water is back flowing thru pump
Or disconnect downstream fitting on fill valve and see if water is flowing thru valve
Depends on which is accessible.
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