SoundGuy wrote:
SIMPLE FRESH WATER TRANSFER
Regardless of whether a trailer has a conventional gravity fill for the fresh water holding tank or has been saddled with some form of over complicated valving system to direct potable water into the trailer the simpler solution is to ignore it all. Instead, invest in a 12 vdc potable water pump, mount it on the trailer somewhere you deem convenient, and plumb the pump's output directly to the tank.
Now that IS complicated! Why not just use the on-board pump to draw the water in like I explained earlier? In my case, I added only a tee, a check valve and some hose clamps. Any needed valves were already there.