Water hookup question...

On my trailer the two water connections are separate. The city water connection by-passes the holding tank and pump. I'm not sure what would happen if I put water in the holding tank and turned the pump on while still being connected to city water. Not sure if the extra pressure would damage the system or not but I'm not curious enough to try it to find out.

Mine has a valve that I can switch from tank water (runs the pump) or off the city water, pressure of what ever is there is what is in the trailer. If I have city water hooked up it won't fill the tank, that is a different inlet. Our old trailer we had there was a automatic type switch..think it had a spring, if the city water was hooked up and pressure was on that side, it pushed the plunger to close off the inlet to the tank..when the city water wasn't on, the spring held the plunger open for the tank-pump to feed the trailer. I always put a pressure valve on when I use city...don't want to blow fittings off the trailers pipes.

depends on your setup...

on mine... even with the water hooked up, the pump still ran and water was pulled from the tank as well as from the city hook up..

from talking to friends it seems that every RV is different,,,,

at least that is what I learned....