This is a water pump pressure control switch, which can realize the automatic control start and stop function of the water pump pressure. Made of high quality materials for strong strength and long durability. Pressure control switch is easy to install, can be used for a long time. Water pump pressure is adjustable through this switch and you can set the adaptable pressure as you the work needs. Suitable for most of water pumps, such as self-priming water pump, injection water pump, garden water pump, etc., Manufacturer: Nikou