The Scanpart Mechanical Waterstop is a waterstop that's installed between the faucet and the inlet hose. The aquastop automatically cuts off the water supply when there's too much water in the washing machine. The Scanpart Mechanical Waterstop lets you determine the maximum amount of water to flow through the aquastop between 5 and 50 liters. Even when your washing machine malfunctions, the aquastop will cut off the water supply. Leaks may be caused by leaking connectors, hose failure, or a malfunctioning component in the washing machine. The aquastop lets you limit the consequences.