BrassCraft 1/2 in. Nominal Sweat Inlet x 3/8 in. O.D. Compression Outlet Multi-Turn Straight Valve with 5 in. Sweat Extension Tube controls water flow to household plumbing fixtures - faucets, toilets, dishwashers, icemakers, washing machines, etc. The straight valve is most often used where the water pipe enters the room from the floor. With a few turns of the valve handle, you are able to stop or start the flow of water leading to the plumbing fixture, allowing for maintenance and repair without shutting off the water to the entire home. Includes bell escutcheon for clean professional look.