Staiger pilot valves are used in order to operate non-contact water taps in energy-saving mode. These valves fitted with microbatteries operate only after being actuated by an electrical impulse. This impulse is triggered by moving your hand in front of the sensor, which triggers the extremely robust pilot valve. After water has been dispensed, the valve returns to its inoperative position. This valve is characterized by robustness, durability and small size.