We have been wintering since 2001 in Az. I turn off the water everytime we leave. I still get jokes from my neighbors at times but why not be smart instead of lazy. I will someday get the last laugh. the quote "that is what we have insurance for" doesn't work for me.
2001 35 ft avalon alpenlite RK
2005 3500 2wd duramax CC dually
trailair center point suspension
JT Strong Arm Stabilizers
KSH 55 inbed fuel tank
Induction Overhaul Kit
TST tire monitors
Some rigs have a "Fresh water fill" valve. This is used to fill the freshwater tank when hooked to city water. My valve is near the water pump. If left "ON", it could/would create the situation you described. Check to see if you have that valve.
We have a valve that we open or close when hooked up to city water which when open fills the fresh water tank. That would be my guess, but like all the other posts, it is just a guess!
2006 Dodge Quad Cab Cummins 5.9 Automatic 4x4
2002 28RKD Lakota fifth wheel
2006 Polaris Ranger
16'Lund w/50HP Merc tiller
A great wife who loves to travel and fish
I love to archery hunt/she joins me and cooks!