The Porter-Cable Z-AC-0809 Air Compressor Pressure Switch with Unloader Valve and Lever is a replacement control component for Porter-Cable air compressors. It automatically starts and stops the compressor by sensing tank pressure and includes an unloader valve to vent residual pressure when the motor stops. A lever provides manual operation, and the part is identified by the Z-AC-0809 model number for compatibility with Porter-Cable service parts.
