black tank flush clogged

[garymcclellan]

Anyone know where the check valve for the black tank flush is on a 2018 21BHS? I cant get any water to go through it. This is my first time trying to use it, and the dealer is 6 hours away so I'm not taking it back there. I tried putting 80 psi air through it with my compressor with no luck. Enclosed underbelly so I cant see up in there unless I remove it.

[garymcclellan]

Well if anyone ever runs into this.. the check valve is behind the shower controls and the factory installed mine backwards. Swapped the lines and it works now.

[Buddy]

Mine does not work either. We have a 2018 21RBS and I checked behind shower faucet and it is not there. Does anyone know where it is located at?

[garymcclellan]

Not sure about the RBS but my BHS was only accessible behind the shower controls due to it being held up by a zip tie. If they didn't install the zip tie, it surely would have fell down the wall below the opening. Did you try looking down the wall with a mirror and flashlight? Other than that I would try and follow the water lines the best you can starting from the exterior hookup. I ended up removing the small panel below the shower pan and could clearly see the lines under there running up the wall. Or give Livin Lite a call and just ask them.

[Buddy]

Thanks was where you said but way to far down to reach. Had to take shower wall down to access