Centrifugal Unloader Valve Assy
Air Compressor Centrifugal Unloader Valves

Price: $45.97
Found under the following brands:
A1 Coupling & Hose, Popular Brands, ProForce, Coleman Powermate Sanborn, Craftsman, Industrial Air, Kobalt, Morgan, Porter Cable, Task Force
If your unloader leaks while unit is running, replace this part. Adjust this part in or out to prevent leaking. 1/8" metric x 1/4" compression