Discharge Unloader Valve (continuous run unloader) for gas & electric powered air compressors. MADE IN USA 1/2" Female NPT Pipe Thread TOP Inlet x 1/2" Female NPT Pipe Thread outlet to tank. (BULLWHIP) Throttle Control Cable included This Valve is recommended for applications 8hp and Below. SELECTING THE PROPER PSI & THROTTLE CONTROL CABLE (BULLWHIP) LENGTH: 1: FROM THE DROP DOWN MENU, PLEASE SELECT WHICH PRESSURE SETTING YOU NEED. OPTIONS INCLUDE (95-125) 95 PSI ON ... 125 PSI OFF OR (140-175) 140 PSI ON ... 175 PSI OFF. 2: FROM THE DROP DOWN MENU, PLEASE SELECT WHICH THROTTLE CONTROL CABLE LENGTH YOU NEED. CABLE LENGTHS ARE AS FOLLOWS 12" 18" 24" 36" 48" 60" ( Visit our store for a wide variety of HP ratings and Multiple Inlet / Outlet configurations ) Pressure can be adjusted 30-40 PSI Higher or Lower. If pressure adjustment is needed, Please see Pic attachment for adjustment instructions. 30 scfm Rating - comes complete with hand unloader and muffler/silencer - Inlet / Outlet are in-line with each other Piloted discharge check valves combine a pilot valve, a discharge valve, and a check valve into one system used to run an air compressor at a constant speed. They are used on both gas engine and electric motor compressors. The top inlet portion of the valve will connect to your main airline from your pump. The bottom outlet will connect to your air receiver tank. The 1/8" Male NPT Connection on the Throttle control cable will connect to the throttle control port on the unloader. The Z bend tip of the throttle control cable will connect to the throttle arm on your engine. Muffler is included to reduce noise.