1/4" F x 1/4" M Unloader & Check Valve

Positive, reliable, inexpensive method for unloading discharge manifold of any compressor - eliminates need for expensive centrifugal and other conventional unloading devices, cumbersome tubing and fittings. Unloads manifold any time air flow stops; not dependant upon power source or tank pressure. Operates in any position. For pressure switch or constant speed operation.Max. working pressure 250 PSI. Brass body, stainless steel springs. Teflon seals.