Clogged Drain
My gray water tank won't drain. While washing dishes this morning the sink started filling up. I thought at first that I had left the dump valve closed but when I went to open it it was already open...
Forum Discussion
If shower and bathroom sink are draining, sounds like a 3rd tank..galley tank. One fifth wheel I had, the handle was behind the 2nd axle. I also have a galley tank in my current unit. No galley drain, maybe slide valve is not opening? Other than that, snake it. I would try snake in sink first, then go to drain on outside and try from there. Be prepared.
