I have two (2) tanks underneath the rear of my Minnie Winnie just behind the bumper that have what appears to be flapper like attachment that might let air out?? Any idea what these might be for, noth...
I never heard of waste tank flappers. I wonder if your flappers are waste tank heaters or tank insulation that has come loose. Tank heaters are very thin sheets that adhere to the bottom of the tanks. Tank insulation is usually thin silver foil finished material, completely wrapping the tank. The tank heaters would be directly on the bottom of each tank and the insulation covering both.