sewer line upgrade - need to replace cap and sewer hose

Dutch has good Ideas and I use the Rhino brand too.But I like a Clear Elbow connected to it so I can see if the tank is clean after dump and rinse

As for the cap I like the ones with a handle,much easier to use with these old hands,Like this one it also comes in clear. the small cap is useful to drain anything into the hose doing away with that surprise when opening the large cap.