Regulator, Internal Service Kit #1166AD

The internal service kit includes both diaphragms, ball, o-ring, and valve. If your air compressor unit is leaking from the regulator and the knob is not cracked, then this kit will fix your problem. 

Note: Does not include knob or large spring. This part is also available in the complete regulator kit SquareOvhKit.

The black o-ring is ALREADY installed on the small black valve. See 'Extra Details' tab.

Click here to view installation video.

Extra Details