Originally Posted by MuddauberE
I have a valve at the pump that needs to be switch from pump mode to city water mode depending on what I'm using. As it was mentioned, if the valve is still on the city water side, the pump will run dry.
The valve at the pump is to select between the Fresh Water tank and an Antifreeze bottle during winterizing.
Selecting between city water and the water pump is automatic and determined by which one has pressure. One way only check valves keep water from going backwards.
This image is actually wrong on the pump side.
The valve indicated is between the pump (actually INSIDE the pump) and the vertical blue line and the winterizing valve is located between the fresh water tank and the pump.
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