Black tank flush hose routing question
I have a 2012 coachmen Chaparaal 280RLS fifth wheel. I removed the access panel to get at the water heater bypass, and noticed something I don't understand. The water line leading away from the black tank flush connection, does not go directly to the black tank, but instead, runs away in another direction that leads up thru the floor. Another section comes out of the same place in the floor (some kind of return, maybe) and then makes it's way over to the tank. Can anyone tell me why those pipes disappear vertically in the floor instead of going directly to the thank?