Introduced by William Elvis Sloan, the Sloan manual flush valve called the Flushometer quickly became the industry standard of manual flush valves in commercial bathrooms. The Sloan Flushometer uses a small amount of water to flush a urinal or toilet. It's durability and reliability continues to this day. In short, the Sloan manual flush valve uses a handle and water pressure through a diaphragm which creates a narrow opening. This so called diaphragm makes a chamber separated from the main water supply. The chamber is re-pressurized after each manual flush with the push of the handle.