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**chuckster57** · 10-14-2018, 03:30 PM

Fresh water system 101: you fill the fresh tank using either a gravity fill port or a pressurized port.

When you turn on the water pump, it pressurized the water system to a preset pressure. Then when you open a faucet, the pump will start at a predetermined pressure and continue to run until the “set” pressure is reached. That’s the reason you hear a “lag” when you start the faucet and it runs a little bit after you shut it off.

There is a check valve inside the pump that stops “city water” from flowing backwards through the pump to the fresh tank.

10-14-2018, 03:30 PM	#2
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,325	Fresh water system 101: you fill the fresh tank using either a gravity fill port or a pressurized port. When you turn on the water pump, it pressurized the water system to a preset pressure. Then when you open a faucet, the pump will start at a predetermined pressure and continue to run until the “set” pressure is reached. That’s the reason you hear a “lag” when you start the faucet and it runs a little bit after you shut it off. There is a check valve inside the pump that stops “city water” from flowing backwards through the pump to the fresh tank. __________________ 2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel. Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS. Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.