Industrial 3/4NPT-1/2-Compression Check Valve

This brass in-tank check valve for air compressors combines a 3/4" male NPT inlet with a 1/2" compression outlet, designed to install between the air receiver and the discharge line inside the tank assembly, preventing reverse flow when the compressor cycles and protecting the pump. Brass construction provides corrosion resistance and durability in typical shop and industrial environments, withstanding repeated pressure fluctuations as the system starts, runs, and shuts off. The 3/4" MNPT inlet threads into standard piping and the 1/2" compression port accepts compatible tubing or fittings, making it suitable for common compressor-to-tank configurations and simplifying installation. Used to maintain tank pressure after shutdown and prevent backflow into the compressor head, this in-tank valve is a practical choice for retrofit projects or new installations on reciprocating compressors where reliable check-valve performance is essential.