BrassCraft® 1/2 in nominal sweat inlet x 3/8 in OD compression outlet multi-turn angle valve with 5 in sweat Extension Tube and Bell Escutcheon controls water flow to household plumbing fixtures like faucets, toilets, dishwashers, icemakers, washing machines. The angle valve is most often used where the water pipe enters the room from the wall. 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 water to the entire home.