When the water flows in the preset flow channel, it pushes the magnet to displace. When it moves to the corresponding reed- tube, the reed- tube conducts after sensing the magnetic field. When there is no water flow, the magnet returns to its position under the thrust of the spring, and the reed- tube is disconnected after the corresponding reed- tube cannot sense the magnetic field. Lightweight, reasonable size, stable performance, low water pressure start-, easy to install, safe to use. Can be perfectly used for water dispenser, water purifier, water vending machine, etc. Made of good materials for robustness and usability., Manufacturer: TRDEWR