Coming out of the campground, there was a steep hill, when I climbed it a large amount of water came out from the back of the FW.
I noticed that once before, but a small amount and I put it down as being cause by the rain. Now I realise that it does not do that after being parked for a long period, even after rain.
I wonder if that could be a gray water tank problem, but I know nothing about holding tanks. How are they joined to the plumbing system? Do they have vent if so, while camping I notice that the kitchen tanks was showing full could it have overflowed from the vent?
I am puzzled?