Hi fellow 5th wheelers
This has been bugging me for days so perhaps someone can see the bleeding obvious as I've reached my paygrade on this problem:
The sink water had been draining increasingly slowly since last summer but, after picking up our trailer (Cedar Creek 2008 37RDTS) from the body shop a couple of days back after an absence of over two months, it has completely backed up.
My first port of call in this situation is the old vinegar and baking soda trick. That didn't work so I had to move on to step two in my plumbing arsenal and remove the trap which proved to be pretty clean.
Still no joy so I snaked the line and again, it seemed clear and clean. After putting it all together,I ran some water and very quickly it backed up.
The next step involved unscrewing the cap on the cheater valve. That wasn't such a smart move as a bunch of water poured out the top of the pipe, much to my wife's disgust.
I have three valves and a main one through which everything exits. The galley valve we leave permanently open. It has a little give in it but I don't think the cable is loose.The tank is sealed so there's no drain plug visible to me.
Fwiw, the sensors show all tanks full.
It seems to me that there is a vacuum in the line and my current thinking is that there is a valve somewhere that is stuck either in the vent or outside the tank or maybe some kind of blockage in the tank.
I'm at a loss. I've managed to schedule a plumber for next Wednesday, which is the earliest I can get - seems to be RV plumbing gravy time as us snowbirds start heading north.
Am I missing something terribly obvious?
Marc