This video shows how effective a Brass Craft drum auger can be in unclogging a toilet in a Fifth Wheel RV. A fifth wheel with a floor plan that has two levels, sometimes has a longer drain pipe than a trailer and the piping bends on its way to the black tank, which makes breaking the clog more difficult than in a trailer that has a straight pipe that drops directly into the black tank. This video has good instructions on how to use a Brass Craft Drum Auger from Hone Depot.