Air Compressor 3/8" Male NPT Pipe Thread x 1/2" Compression Thread in Tank Check Valve
The 3/8" male NPT side is typically used for an internal air tank screw, and the 1/2" compression side is an inlet for incoming air from the compressor, pump.
NPT Pipe Plug: If your compressor does not require an unloader port, it can simply be connected to a 1/8" port. This valve is also equipped with a female NPT threaded port.