Shakedown weekend questions

Originally posted by StephenH If the pressure isn't too great with the city water connection, turning off the city water and using the pump from the tank is a viable solution. I don't know if I would run the pump while city water is connected. It might cause a backflow issue with the city water connection if that is lower than the pump pressure. I don't think there is an anti-backflow check valve in the city water connection.

There is. If there wasn't, your pump would just send all the water out the city water fill. Under the city water fill cap is a screen, remove that screen, and WALLA!! a one way valve. In fact, when winterizing with pink stuff, the little nipple of the one way valve is supposed to be.. well.. "manipulated"... to allow pink stuff back up that line to protect it and the valve.