1、The bottom of the switch is made of zinc alloy. The cheap and low‑quality products on the market are made of plastic. The zinc alloy material is durable, corrosion‑resistant, withstands high pressure and does not seepage 2、The use of silver material double‑contact clutch, (the contact is 15‑sided contact is more stable than single‑point contact) 3、To ensure the strength of the switch, the quality is stable and reliable, and to ensure a long service life, frequent starting should be avoided 4、When the pressure in the pipeline is released to the low pressure of the switch, the connection will be reconnected, and the pressure will be disconnected when the pressure reaches a high point 5、The switch is suitable for automatic cold and hot water self-priming booster pumps of major domestic and foreign brands, for internal and external threaded elbows