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The Bard 800-0209 Cooling Cap Tubes are an OEM refrigerant metering component used in Bard wall-mount and packaged cooling equipment to regulate refrigerant flow through the system and maintain proper operating pressures and evaporator performance. When cap tubes become restricted, damaged, or altered, cooling capacity and efficiency can drop and the unit may short cycle or freeze, so replacing them with the correct Bard 800-0209 part helps restore factory-correct refrigerant control and dependable operation. Because cap tube sizing is application-specific, confirm your Bard model and serial number against the unit parts list before ordering and follow proper refrigerant handling and evacuation procedures during installation.