Originally Posted by ScottBrownstein
Yes...and some tubing. My Bounder had such a feature. It is a bypass that goes from the high pressure side of the water pump to the intake side of the water pump. When you have city water hooked up it pressurizes the plumbing system. The pump has a check valve on its output side to hold the system pressure. If you put in a bypass, the city water pressure will go around the pump and fill the tank.
Brilliant, and easy! Thanks!
Does it also eliminate all of the venting issues? I suspect it will because the gravity fill tube acts as a super vent.
Any downsides to this mod? Why aren't all the RVs plumbed this way?