A type of shut-off valve commonly used in residential plumbing, this device regulates water flow to appliances like clothes washers. It features a hollow, perforated sphere within a housing. Rotating the lever a quarter-turn aligns the sphere’s perforation with the inlet and outlet ports, allowing water to pass. Conversely, rotating the lever perpendicular to the flow path blocks the ports, effectively stopping the water supply.
These valves offer quick and efficient control over water flow, minimizing the risk of leaks and water damage. Their simple design and robust construction contribute to a long lifespan and generally require minimal maintenance. Historically, less reliable gate valves were common for this purpose, but the advent of this superior alternative offered improved durability and easier operation, eventually becoming the standard in modern washing machine installations.