Electronic Controller Water Pressure Switch for Automatic Booster Pump Industrial Supply 220vFeature:1. The point water pressure switch is silver plated with high grade pure copper conductive sheet, with good response effect.2. How to adjust the water pressure: cut off the power first. Tear off the plastic casing, press "+" to increase the pressure (counterclockwise), press "" to decrease the pressure (clockwise).3. With high-quality sealing material, the water pressure regulator is durable and resistant to high temperatures, its cuicuit is not easy to be damaged.4. You can choose the suitable water pressure switch according to different power requirements and the diameter of the male thread.5. The water pressure switch can automatically maintain constant pressure in the pipeline as well as constant water flow. Specification: Item type: water pressure switch Rated voltage: 220V Rated current: 16A Male thread diameter: about 12.5mm/0.5in (G1/4) Size: about 50 x 50 mm / 2 x 2 inch Pressure range (optional): 1.0-1.8KG (fit for 125W) 1.5-2.2KG (fit for 250W / 300W / 371W) 1.8-2.6KG (fit for 50W) 2.2-3.0KG (fit for 750W) Package List: 1 x Water Pressure Switch 1 Accessory Bag Note: For example (1.5 - 2.2KG) Technical explanation: When the water pressure is 1.5KG, the water pump will start automatically, and the 2.2KG pressure water pump will stop working.