The Campbell Hausfeld CV223300AV is an OEM in-tank check valve for Campbell Hausfeld air compressors, featuring a large-port 1/2 in compression x 1/2 in male pipe thread (COMP x MPT) port configuration for robust flow between the pump and the tank. It allows air to move from the pump into the tank when the compressor runs while sealing off to prevent reverse flow as tank pressure increases, helping maintain stable pressure and efficient cycling. This CV223300AV replacement valve is listed as the genuine Campbell Hausfeld check valve part in official service literature and is used in in-tank check valve assemblies that require this exact porting and size.
