Hi we have a 2019 Thor Compass that has two grey tanks.
Recently we noticed our shower backing up and bathroom sinking caused water to come up out of the shower.
We have a black tank and two grey tanks. We have one main grey tank valve that we pull to empty that tank. However, there are also two smaller grey tank valves that go to kitchen sink and shower/bathroom sink.
It seems that they can both be isolated - not sure why you would have one closed and the other open.
Right now, our shower and bathroom sink are draining fine but we pushed IN both of those smaller grey tank valves. Does this mean they are open or shut? If pushed in means shut, why is the shower now draining fine?
I guess I just don't understand how the grey tank systems work.
Can anyone confirm or explain this to me?
Thank you so much in advance!
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