Camco's RV Gravity Water Fill Adapter with Shut Off Valve and Clip allows you to quickly fill your RV's gravity water fill, hands-free. The adapter works with standard drinking water hoses and helps fill your water tank in a fraction of the usual time required. It is made of durable, drinking water safe plastic and features a shut off valve for flow control. The provided clip allows hands-free filling. It connects the water fill adapter to the gravity water inlet on your RV. The clip is compatible with 1 -inch threaded and bayonet style inlets. When using the adapter, be sure to monitor your RV's gravity water fill to prevent overflow. Patented.