he Regulator controls the amount of air to your hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks.  Please confirm your model number before ordering: The H1504ST used the 9051148-NU regulator, which is now obsolete...

1/4" Ball Valve Drain Cock for air compressors. Keep your tank from rusting. Replace this if it is leaking or will not work.

Old Part Numbers: 9412469Elbow 1/4" M Dob Cone includes the compression nut and ferrule.

Air compressor check valve (one-way valve). If the compressor leaks constantly AFTER the unit shuts off, replace this part. The check valve is a one-way valve that prevents air from back-feeding from the air tank.