Camco Easy Slip 4-in-1 RV Sewer Hose Adapter With Elbow, Connects hose to dump station with a larger inside diameter for faster dumping. Elbow's tapered end accepts all 3" hoses and slip-over fittings. Adapter fits into 3" slip or 3", 3-1/2", and 4" threaded pipe. Elbow separates from adapter for storage in bumper.