I just decided to pay little attention to the black water tank levels when less than 100%. The two of us will not fill any of our 40 gallon tanks in a week. I have a 11 gallon rolling tank and if I get concerned I can fill it and take it to a dump station.
2000 Quad Cab 2500 Auto w/4:10 rear end. DTT 89% VB, TC, Mag HI-TECK Pan, Smart Box, EZ, PAC Brake, Pillar gage mount with EGT, Boost, and Tranny output temp, Miller Manufacturing Truck Bed Cover, with RBW 5er hitch, and
Rigged to tow a 29' Automate 5th wheel.