Recommended as Needed Our Worthington KIT-1093 Replacement Ring Kit containsall the parts necessary to replace the piston rings onWorthington Compressors beginning with Serial # BN. Worn piston rings are often a contributing factorin the decline in performance of a compressor that has been inservice for an extensive period of time. Worthingtonrecommends replacing the piston rings when a compressor doesnot meet its normal air delivery or when its oil consumption isconsidered to be excessive. Generally, anycompressor consuming more than 2 oz. of oil per 100horse-power-hours does not meet commercial standards and wouldrequire piston ring replacement. eIndustrialSolutions providesquality Worthington replacement parts that meet or exceedthe OEM specifications. Aftermarket parts are more costeffective than brand name parts and can typically allow for areduction in your annual maintenance costs over the life of thecompressor.