Are you sure your black tank is not tempting get a clear elbow for your dump outlet so that you can actually monitor what is happening with the tank. It could be that its empty and you have scum or toilet paper causing the reading. Have you tried flushing the tank?
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Retired Navy
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho
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