We've got a 2016 37FS. It has a thin in diameter, 2 inch grey hose hooked to a macerator. Have never used the macerator, but use the macerator hose to empty the grey water every other day. I mounted a black/grey sewer hose container pipe on the back of the stabilizer jack frames and it sits right below the drain hole in the compartment going up to where the black and grey Rhino hose gets emptied, when emptying at a normal dump station.
Ric and Jan Golding
2016 Jayco Seneca 37FS