Originally Posted by Wazbro
You could try having the faucet open till no pressure in lines then cycle the pump a few times. Otherwise add a separate check valve or even a ball valve.
Quite a few times if necessary IMO.
Also, using an inline RV water filter in your potable water hose will help prevent grit in the pump's check valve in the future -- both
when filling the tank, and when hooking up to city water.
And yes, using the tank is an excellent short-term solution.
Happy trails . . . and . . .