Wildwood Dbud 28 plumbing question

[RiverBird]

Decided to fill the gray tank to test for leaks and the gauge accuracy. Ran water into the kitchen sink.



Strange... The backup water showed up in the bathroom sink, not the tub. Hmmmm. There must be a check valve in the tub's drain line. But why??



Thanks for any thoughts


Sent from my iPhone using Forest River Forums

[onthelake]

When our grey is full the tub starts filling. Don't think there is a check valve and when I take the access panel off I don't see one, only direct connection to grey tank.


Sent from my iPad using Forest River Forums

[fonzie]

Your tub might go into the black tank instead.

Here is a thread as example.....

http://www.forestriverforums.com/for...ank-14948.html

[onthelake]

Interesting thread.
Glad ours is into the grey tank.

Probably due to how the tub is positioned in the camper other wise it would be plumbed into the black.

RiverBird, our unit is a 2012, so the floor plan should be the same as yours.