Features: Made of high quality material, strong structure, anti-corrosion, durable in use. Designed to automatize the starting and stopping operation of water pump, and maintain the pressure and flow. Automatic control, no manual operation is required. When the system pipeline pressure reaches the upper limit, the power will be cut off automatically and the water pump will stop working. When the pressure reaches the lower limit, the power supply will be automatically connected and the water pump will start to work. Simple operation, stable performance, low consumption, saving energy. Suitable for hot and cold water automatic pump, the other family boost pumps, pipeline pumps, etc. Specification: Voltage: 220V Joint thread: G3/8" Pressure control range: (Optional) A. 1.0-1.8 KGF /c On: 1.0 KGF/c Off: 1.8 KGF/c B. 1.5-2.2 KGF /c On: 1.5 KGF/c Off: 2.2 KGF/c Package List: 1* Pressure Switch Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.