Fresh water tank back filling thru pump
I am having a problem where the fresh water tank is filling while hooked up to city water. I think is must be coming thru the check valve in the pump. Does anyone know if the hole pump has to be repla...
Forum Discussion
SaltiDawg wrote:wnjj wrote:
...It uses check valves to push the water toward the outlet.
How does that work?
RV water pumps like the Shurflo models are positive displacement diaphragm pumps:
"A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid."
Diaphragm pump
The graphic shows a 2-chamber pump, while the Shurflo and others have 3 or more chambers, but the concept for each chamber is the same.
