Hi everyone, I’m new to the forum and to Rv life. I have a low mileage 2012 Thor chateau 25c, and am learning the ropes. The problem I’m having is when I turn on the water pump the toilet fills up and wants to spill over so have to keep flusing don’t understand why. Any thoughts? I have a porclin toilet with foot pump and not on any hook ups Would appreciate some help on this thx.