Originally Posted by Pops927
I will try these suggestions and hopefully it will help. I do have a shutoff where the hose is used to winterize. Will that work to stop the tank from filling if I shut it off?
Yes it will stop the fresh tank from filling... BUT... it will not fix the issue of the water getting past the pump's internal check valve and so, by turning the winterizing valve, the water will simply divert out to the winterizing port and run down the side of the R/V. (unless you have just a short winterizing hose with a cap near the pump)
If you have a short hose with a cap for winterizing, you could make sure the cap is tight and then it temporarily solves the issue of filling the fresh tank but you wouldn't want the cap leaking water inside your R/V.
If your winterization hose goes to a port on the outside, you could screw a $1 garden hose shutoff in the port and again, temporarily stop the filling of the fresh tank. These suggestions are just band-aids to salvage a camping trip.