Glad that you were able to fix your problem. My first problem with the valve on my 2016 2351 was when I woke up to find water flowing onto the bathroom floor and another time it came out from under the fridge. PC replaced the valve. Then the new one malfunctioned as yours did by filling the holding tank. I got fed up with it and elected to have PC close off the valve so that I will be filling the holding tank using the fill on the passenger side.