What is it?

[winter texan]

Had water leaking under batroom sink. Got under there and found the loose line but I have 4 water lines, 2 go to sink faucets, but the other 2 are connected with a something that looks like a diaphram or a check valve? Anyone know what's this is for? I have a 2007, 344RET, Mountaineer.

[Lambchop]

It's an anti-siphon valve for your black tank flush. It prevents black water from coming back to the hose.


Roy

[CRUZIN 2]

winter texan

We have the same rig, I also had a water leak in the same place, it was a bad check valve (anti-siphon) for your black tank flush. I had to replace it, the maker of the valve sent me a new replacement.

[winter texan]

Thanks for the info. All I had to do was tighten th connection. Valve was not not leaking.