Some time back, I posted that I was unable to dump the grey water in my 2016 Era 70X. Took it to the dealer who said the valve had come apart. They installed a new grey tank valve. Sounded good to me.
Well, next attempt to dump grey water was the same - nothing came out. Macerator pump is working.
Back to the dealer, who said there is nothing wrong with it. They dumped the grey water no problem. Service asked me if I had both the black and grey water valves open at the same time.
I said "no", the manual states that both valves should NOT
be opened at the same time. The service person told me, that you have to dump the black first and leave the valve open. Then you can dump the grey. I said ok, maybe I read it wrong.
Went home and re-read the owners manual. It clearly stated that you should not
have both valves open at the same time.
I was confused, and called Winnebago direct for an answer. The service tech at Winnebago told me that the owners manual was incorrect. My Era had a plumbing update since the manual was printed. The black tank and grey tank share a common line. The black valve has to be left open, so the grey water can be pumped through the same line.
Now I am back in business.