49816283C Ingersoll Rand Pilot Unloader Check Valve T30 Gas Power Air CompressorBrand 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