I hope someone can give me a place to start looking at a problem on our 28z - The gray water "meter" on the wall will sometimes read full when I have just emptied it, then next time I check its shows empty - had it in Piqua for a few months with this listed as an issue - unfortunately not happy with the lack of results. Will not be back at the dealer ever again!!
As a side note, I have to wonder do the folks building these just throw a few extra screws in the camper for fun? I keep finding them but not empty holes