100 water valve is a diaphragm tank and water regulating valves Luo liquid height. Controlled by a float valve, when the level reaches the height of the valve is set by the relevant structures will signal to the pump, the pump stops water; when the liquid level is below the set position automatically start the water pump. The smooth operation of the valve, effectively prevent water hammer and pump water pump stops generating keys, avoid excessive pressure pipe produced. Suitable for water tanks, water tower automatic water supply system. The valve maintenance is simple, flexible and durable, high accuracy level control, the water level does not interfere with the pressure and close tightly watertight, reliable performance.