Originally Posted by bulletbob
The check valve is located in the bath lav. We ran into a rash of bad ones. Your dealer should be able to replace that for you
How would you determine its bad, Is it normal for the check valve to make a buzzing sound. We finally pick our nitro fifth wheel up on Friday and when I hooked up the hose to the flush I could hear a buzzing from inside. Found under sink, both lines felt cold, so I think water was making it through, it felt wet so I tightened the connections a little. Water does come out main dumping valve. I put my ear to the underbelly of the coach and only could hear a little water trickle noise.
I just posted about a leaky black water valve also. Hope bobs reads this he seems to have a lot of answers