It sounds like a shower leak to me, I think I would leave the panel off, turn the shower on and then take a look-see to see what is going on. Every place you are describing is adjacent to the shower. If it is indeed the back flow preventer (not sure of the proper name??), I too would appreciate learning where it is on this model as I have no clue. I also flush with the valves closed and like you I cannot fathom how that would affect anything. One place to check is whether or not shower spray is going behind the shower surround, I cannot remember if it is caulked around the top of not?? All of this is assuming that at no time have you overflowed the gray tank since it would back up through the shower and or any weak areas in the drain system. You can also turn on the Sani-flush and observe the same area as well. Keep us informed, I very possibly may have a similar problem at some time.
Bingo
__________________
Bingo and Cathy - Our adventures begin in the hills of WV. We are blessed by our 2014 3850FL Big Sky (previous 2011 3750FL and 2007 3400RL) that we pull with a 2007 Chevy Silverado Classic DRW CC dually.
|