I just watched a YouTube video on the 2014 TMC motorhomes covering specifics to the line.
The video showed that the waste tank dump outlet (where the dump hose connects) is made to swivel. The intent is to reduce/prevent dripping after the dumping process.
This made me think about several posts where owners of some models complained that the dump was pointing up...
This is a new concept to me. Maybe worth checking if the dump pipe end is moveable.