Originally Posted by tkocamping
2021 Entegra Aspire 44B. Yes it has the shower miser.
This is from the 2021 Aspire Owner's Manual:
Click image to enlarge.
I believe that the "Off" position for the Shower Miser valve has the lever pointed down.
Although a failed check valve on the water pump is a common cause of a filling fresh water tank whenever hooked up to city water, unless yours has suffered infant mortality, I'd first check the Shower Miser.
Also, your fresh water tank has an overflow relief. If the tank is full and more water is pushed into the tank, it will flow out of the tank thru the overflow to prevent damage to the tank from overpressure and you'll see that running onto the ground at the same rate that it's flowing into the tank.