nefftracy
New Member
Hey, all, I have a 2018 grand design momentum 357TH. We have been living in it since we bought it brand new in 2018 and when the gray tank would fill, it would back up into the bathtub we started to notice about a that wasn’t happening anymore and then realized it was leaking into the underbelly, we have never been able to find the leak and we have replaced the bottom of our trailer three times. Has anyone else encountered this? Any insight on where we should look?