Joezeppy
Well-known member
Actually the reason I bought my first one (for our 2000 Fleetwood TT) was because the black tank would frequently stop draining when I knew it was not even close to empty! That TT did not have a black tank flush port so I bought a clear elbow with a water hose fitting. The drain pipe was a straight shot into the tank so a 10 or 15 second blast of water up the pipe would easily clear the blockage. I got used to using it and liked knowing when the tank was running pretty clear so I kept using one on future trailers, too.