We had a 2016 Adventurer 80RB. To keep weight down they fitted a very meager 6 gallon grey tank which as you can imagine doesn't take long to fill even when being mindful of the limitations. However, this wasn't the actual issue. From the time the camper was new I would empty the tank from full and the monitor panel always said 1/3 full when it was empty (not a drop coming out). I kept thinking how could the sensors be gummed up so soon ? This was a grey tank after all, and the unit was brand new. Eventually I discovered that the tank was installed incorrectly. The tank was installed at an angle that kept the tank from emptying completely. So how does a 4 gallon grey tank sound to you all ? I tried to determine if this was something I could fix myself but gave up seeing at how much stuff was crammed into such a small space below the shower. There was no room whatsoever to accomplish anything without some serious disassembly of structure. In the end I would routinely drive the truck up as high as I could on the Anderson levelers to raise the front as much as possible to get as much rear slope as I could to encourage more water to drain from the tank. This was very tedious and annoying. My point here is simply that Adventurer is not without fault in their quality control and pride in workmanship.
