EW air flow check valve 1/2" npt

These are designed to protect you from accidents caused by air hose whip, a dangerous situation that occurs when air hoses snap while under high pressure loads. When an air hose ruptures, the flow check valve senses an increase in air and automatically reduces the flow to a safe level. These are easy to install, the inlet pipe port of the valve is threaded into the compressor air line upstream of the hose. The hose is threaded into the outlet port of the check valve. A must for any shop! MADE IN USA.