Forum Discussion
Old-Biscuit
Jun 28, 2016Explorer III
Water pump has an 'internal check valve' ---- a diaphragm ---- that seals off to stop backflow thru pump.
Also if you have a 'Fill' valve it can be leaking thru
Disconnect pump suction line and see if water runs out (back thru pump) when using city water.
If it does......install a in line check valve (Shurflo has them) in pump suction line ($10-15) Problem solved.
If no water ...then fill valve is leaking thru.
Also if you have a 'Fill' valve it can be leaking thru
Disconnect pump suction line and see if water runs out (back thru pump) when using city water.
If it does......install a in line check valve (Shurflo has them) in pump suction line ($10-15) Problem solved.
If no water ...then fill valve is leaking thru.
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