1,Made of alloy and ABS materials, anti‑corrosive, the structure is very sturdy, and durable for long‑term use. 2,Designed to automatically and quickly start and stop the the water pump, and maintains pressure and flow. 3,When the system pipeline pressure reaches the upper limit, the power is automatically cut off and the water pump stops working. When the pressure reaches the lower limit, the power is automatically turned on and the water pump starts to work. 4,The automatic control is very convenient, which is safe and reliable and also requires no manual operation. 5,Very simple to install with small size and light weight, and the low power consumption will save the energy. Item Type: Automatic Water Pump Pressure Switch Material: Zinc Alloy and ABS Function: Automatic water pump pressure switch. Model: JSK-3A Rated Current: 15 or 10A Maximum Working Pressure: 100000-500000 (Pa) Interface Thread: 3 or 8in Female Thread Pressure Range: 2.2-3.0kg or cm² Power: 750W 1 x Automatic Water Pump Pressure Switch Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.