I struggled with hooking up my waste hose to the hook up for 3 years. But it worked. Bought a new hose by a different manufacture and it wouldn't bend properly so I ended up using my old hose that leaked. With both tanks empty, I loosened up the hose clamps on the gray and black pipe and moved the exit pipe up 15 degrees. That shift gave me all the room I needed to connect my new hose. Wow . . . wish I had done it 3 years ago. One note . . . tanks need to be empty ! !