Check Valve, 3/8" Compression x 1/2" MPT #0E5372

Air compressor check valve. 3/8" Comp x 1/2" MPT with 1/8" FPT side port. 

The check valve is a one-way valve that prevents air from back-feeding from the air tank. If your unit has a hard time restarting when trying to cycle or your pressure switch is leaking out of the small bleeder valve on the side (or underneath), order this valve.

Note: The replacement valve may look different from the original part.