The Champion 145-175-4P-1/4UNLOADER-26A Air Pressure Switch is a four-port control switch for air compressors that activates at 145 psi and deactivates at 175 psi. It includes a 1/4-inch unloader valve port for venting head pressure on startup, enabling load-free restarts and reducing motor wear. Rated at 26 amps, this switch is designed for higher-demand compressors and is commonly used in 145–175 psi applications. With its four ports and integrated unloader, it serves as a replacement switch on many two-stage air compressors.
