Camco's Flexible Camper Drain is a complete rust-proof sink drain system that is designed for campers and RVs with a single sink and no holding tanks. The drain allows your sink's gray water to release directly from your RV's sidewall or underneath the RV. It includes 25-inches of ¾-inch ID hose. The drain's sink end accepts a standard 1 ½-inch-11 ½ threaded drain fitting. Durably made, the drain trap is constructed of a chemical-resistant polymer. The evacuation flange is made of resilient ABS construction with UV stabilizers. It is designed for a quick and simple installation.