I turned on my pump last night and everything was fine for a few hours. Then we heard a noise and the pump starting running and never shutoff. I searched and found the valve that turns the motorhome f...
Sounds like the valve had water in it over-winter and finally blew out and the valve needs to be replaced.. If that is teh case it's a common 3-way valve though the new one may LOOK different so long as the ports are identifiable and you hook it up right it will work..
These valves often have 1/2 inch IPT Connectors so you can (As a temp measure) get a short 1/2 inch nipple and plug.. Plug the fill line to the tank and connect the other two to the nipple till you get the valve you want.