2021 3230CK Black Tank Check Valve Location

[Forestville]

Does anybody know how to access the black tank check valve that is somewhere behind the washer/dryer. Ours decided to start leaking today, and luckily I caught it early and it just went down into the storage compartment. Is it buried inside the wall that I'll have to remove to get to? Thanks for your help!

[Mikendebbie]

I looked at your floor plan to see where the washer is located…and it is up front in the bedroom. I have no idea how to access the plumbing - but someone here will know.

[Carl n Susan]

Originally Posted by Forestville

..Does anybody know how to access the black tank check valve that is somewhere behind the washer/dryer...

I don't understand. What is a "black tank check valve"? The washer normally drains to the grey (shower) tank. Are you saying yours goes to the black tank?
Secondly, what check valve?. AFAIK, there is no check valve in the washer drain line system.

I have a different drain location, so I am guessing here, but I think the drain connection is on the passenger side wall of the compartment. That line drops down to the floor and then runs along the wall (inside the boxed area) until where they dropped the lines down into the pass through compartment and connect to the plumbing for the shower (or black) tank. But I could be wrong.

Where is the drain leaking? At the wall connection (like a backup issue) or somewhere else?

[RMcNeal]

Do you mean the vacuum breaker for the Black Tank Flush?
If so, it may be under the bathroom sink. Ours was located there, before I removed it and bypassed altogether after a leak like you describe.

Edit: Forgot to mention...Look for white PEX lines in and out of the bathroom sink area. Your cold water should be blue and hot water should be red.

[Carl n Susan]

Originally Posted by RMcNeal

...Do you mean the vacuum breaker for the Black Tank Flush?...

Good catch! I bet that is what the OP was referring to. I got sidetracked by the washer drain comment.

[ReneT]

Do you have a washer installed? If you do, maybe that is leaking somewhere or the water hose connections for the washer