On my systems there is a valve between the tank and the city water hose fill attachment. With it open the city water goes to the tank to fill it. Closed the city water pressurizes the system and the pump and tank are "out of the loop."
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."