HappyKayakers
Well-known member
We've been getting some black tank smell in the rig lately so I'm checking all possible sources for problem. Already checked in basement, no water leaking from black tank pipes or flush system. No water noted around base of toilet. Thought I'd check rooftop vents next to see if one was clogged and that's where the confusion started. There are 3 identical vents up there (2 on off door side and 1 on door side). There's another just forward of the shower skylight and I have no idea where it goes. Also not real sure about which of the other vents go to which tank but they're all clear. Can anyone tell me what this vent is for?