If you can see it why can't you fix it? a pic would be nice. allot of times to fix these items it requires taking more then just the flange (on the black tank) apart but also loosening other flanges (gray water) to allow clearance or dropping coorplast.
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