This water flow switch features high temperature resistant, high sensitivity and safe to use. It is widely applicable to increase water pressure in low water pressure area, especially for low water pressure of shower or automatic cycle of solar water heater.Water Flow Switch adopts a Magnetic Reed Switch, G 3/4;male threaded ports each end. Equipped with filter water entry. Mainly used for water heater, boiler, water dispensers, coffee machines, hot card machines, steam equipment, water system, the campus card sales, selling self-help water systems, water treatment equipment, cooling systems, mechanical equipment, instrumentation, pharmaceutical equipment.