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The Bard 800-0092 cap tube assembly is an OEM refrigerant metering component used in Bard wall mounted air conditioners and heat pump packages to precisely control liquid refrigerant flow into the evaporator circuit, helping the system maintain stable suction pressure, proper superheat, and consistent capacity. If you are troubleshooting low cooling performance, suspected restriction, or contamination after a sealed system repair, replacing the capillary tube assembly with the correct Bard part helps restore factory designed operation and fit. Match this part number to your unit model and serial information in the Bard service literature before ordering, since cap tube sizing is application specific and not interchangeable across all Bard chassis.