I have the bypass and can use the pump to draw water from a container to fill the fresh water tank, but it takes forever to fill the tank.
I bought a Reliance 5 gal water can. Instead of screwing the tap/ valve I bought a 1" ball valve and barbed fitting to install the hose. Fill this up, close the valve, raise the can, install the hose into the gravity fill, open the cans air bleed, then open the ball valve.
Shot gun water fill! The 5 gallons empties in about one minute! The only hard part is lifting 5gal of water to the height of the gravity fill.
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