O-ring Seal (Gasket) on top of the Valve Plate. Usually replaced when the Cylinder O-ring is replaced or if replacing the Valves.

1 HP Obturating Ring. This is the O-ring Seal that installs on top of the cylinder cup (bottom of the valve plate).

Pressure Gauge for California Air Tools compressors. Replace if the gauge needle doesn't move or if leaking. Specifications 1.5" face back-mount gauge 175 PSI-rated

Piston Ring [MP1005]. Replace this if your compressor is producing little pressure, or no pressure at all. For 1 HP units.

Old Part Numbers: 90506-S-CATReplacement Air Regulator (Square). The regulator controls the amount of air in your air compressor hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks. 

Washer for the Cushion Foot.

Intake (Inflow) Valve for California Air Tools pumps. This is the valve on the bottom of the valve plate. If air leaks out of the intake filter or if the compressor just isn't performing like it should, order this kit. A loss of pressure or slow...