Camco's RhinoFLEX RV 4-in-1 Sewer Elbow takes the hassle out of connecting to dump stations. It has a built-in gasket for an odor tight connection. It features a translucent elbow that rotates 360 degrees. The elbow includes a locking ring and is designed to work with Camco's RhinoFLEX sewer hose. The elbow detaches from the 4-in-1 adapter and fits into an RV bumper. The 4-in-1 adapter fits 3" NPT, 3-1/2" NPT, 4" NPT and 3" slip sewer inlets.