Brand new Ingersoll Rand in-line piloted unloader check valve combination with relief valve, part number: 49816283-C. This is a solid brass valve that is manufactured by Conrader in the USA. This combination valve has a 5/8" inverted flare inlet on the top where your main line from the compressor pump comes in. The bottom port on the valve is a 1/2" female NPT that connects to your existing fitting (commonly has a relief valve in the side) to attach to the tank. This valve comes equipped with a 325 PSI relief valve and a 1/8" female NPT port to install a throttle control valve that is factory set to kick on at 145 PSI and shut off at 175 PSI. Specifications: Inlet: 5/8" Inverted Flare Tank Connection: 1/2" Female NPT Throttle Control Valve Port: 1/8" Female NPT Factory Set ON / OFF: 145-175 PSI Solid Brass Made In USA OEM Part Number: 49816283-C For Use With Ingersoll Rand T30 Gas Powered Air Compressors