golf_bears wrote:
Dutch_12078, I think putting a check valve on the output side of the pump at the Anderson Valve will allow the pump to cycle on and off. Because the leaking pump check valve is internal on the pump, it will still leak and the pressure will drop at the pump. No water will leak into the fresh tank, which I think is what you are thinking, but the pressure drop will let the pump cycle on and off.
If you examine the flow path inside the pump, the internal check valve is on the output path. And why would you have the pump turned on anyway, if you're connected to a city water supply?