Ring Set for HP (small) piston.

Replace every 3-4 months if the air compressor is used frequently. A dirty filter can cause damage to the pump's valves, clog your check valve, and reduce the CFM output of the compressor. Always keep an extra handy!

Old Part Numbers: 165-0304Overhaul kit for the HB55 in-line 2-stage air compressor pump, includes valve plate assembly with valves, gasket set, piston ring set, conrod insert bearings, oil seal, and air filter element. If you have a sudden loss of...

Old Part Numbers: ST072321AV, 058-00123/4" compression nut & sleeve (2 required). For air compressor units made before 05/20/1994.