Camco RV Easy Slip Elbow and 4 in 1 Adapter helps to connect hose to dump station. The elbow’s tapered end accepts all 3"Hoses and slipover fittings. Adapter fits into 3" slip or 3", 3-1/2" and 4" threaded pipe. Larger inside diameter allows for faster dumping. Components separate for storage in bumper. Patented. Securely connects RV sewer hose to dump station Patented spin-lock rings for effortless hose connection Adapter fits into 3" slip or 3", 3.5" and 4" threaded pipe Components easily separate for storing hose in a 4" bumper Larger inside diameter for faster dumping