Only available in the SquareOvhKit. The black o-ring is ALREADY installed on the small black valve. See 'Extra Details' tab above. Click here to view installation video.  Extra Details

Old Part Numbers: S137-0001Air pressure knob for belt-driven air compressors. Replace if broken or cracked. Make sure your spring is still there under the knob.  This part is only the knob. If you need the complete kit order the SquareOvhKit. The...

Only available in the SQUAREOVHKIT.

Old Part Numbers: 045-0043Bearing carrier and bearing for flywheel end..

Old Part Numbers: 5140121-073/8" compression inlet x 1/2" male NPT outlet check valve with 1/8" hole and plug. If the small unloader (bleeder) valve on or under your pressure switch leaks constantly AFTER the unit shuts off, replace this part. The check...

Old Part Numbers: 60-4-61-4, 058-0017-MAT1/4" compression nut and sleeve. Order two, one for each end of the tube.

Old Part Numbers: 136-0069, SRV250145, 1229W-145Air compressor safety relief valve. If your valve leaks below the pressure listed on the side of the valve, replace this vital safety feature.Specifications MPT Inlet: 1/4 in. FPT Outlet: 3/8 in. Preset...

Old Part Numbers: 019-0052Felt air intake filter for Sanborn 130/165 style air compressor pumps. Order 2 or 3 for spares. Replace this every 3-4 months if the compressor is used frequently. A clean filter allows your pump to operate at its max...