2018 Jayco North Point 381FLWS - Gray water tank air gap
Purchased this 5er 8 months ago new, noticed the front gray tank filled quickly because the shower backed up with 1-2 in of water when taking a shower, now realizing that even empty the shower backs up the same. As soon as you open the release valve, when empty the water flows right out of shower. I would think there is a missing air gap for the front tank is why the shower backs up but not sure what to look for, but before I take it to the dealership for warranty work want to have the data to back me up.
Anyone ever experience this ?