Conclusion on water pump troubleshooting.
Rv water pump check valve leaking.
The valve is designed to let pressured city water enter the rv s plumbing system when hooked to a charged hose bib via your water hose in an rv park and prevent the water pump from pumping water out of your potable water tank onto the ground when not hooked to a charged hose bib.
Rv water pumps should turn on every time you flush the toilet or turn on a faucet.
If after you complete your tasks and turn off the water and the pump continues to run and run your rv water pump is likely leaking somewhere.
Go whole hog and replace the pump itself.
Other issues include loud pump noises and vibration a leaking water pump the pump fails to shut off inadequate water pressure or flow the pump won t prime the water flow sputters and more.
Add your own 1 way check valve to the water line on the inlet side of the pump.
Install a new check valve and make sure the arrow is pointing at the freshwater tank.
The first thing to do is check for a broken check valve.
Rv water pump leaking.
For those just entering the rv lifestyle there is a check valve behind your city water hook up.
Check for a rebuild kit for the water pump and find out if the internal check valve is a user serviceable part some art some are not.
Check amazon or rv water filter store for options.