Feature 1Made of high quality material, strong structure, anti-corrosion, durable in use. 2Designed to automatize the starting and stopping operation of water pump, and maintain the pressure and flow. 3The maximum working pressure can be up to 175psi. 4Simple control to maintain constant pressure during operation. 5In order to avoid the pump on/off & pressure high/low problems.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. The maximum working pressure can be up to 175psi. Simple control to maintain constant pressure during operation. In order to avoid the pump on/off & pressure high/low problems. Specification: Model: KRS-1 Rated voltage:240V / 120V Frequency: 50 / 60Hz Rated current: 17A/ 3HP 20A/ 1.5HP Minimum pressure: 20 PSI Maximum pressure: 175 PSI Pressure range: 20-40,30-50,40-60 PSI Thread: 1/4 NPT male thread Package List: 1* Pressure Control Switch