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Bard part 7000-044 is an OEM 3/4 inch male coupling designed to join 3/4 inch tubing in Bard wall mount and packaged HVAC refrigeration circuits where a dependable, leak resistant connection is required. This fitting is used during service work and component replacement to help restore proper refrigerant flow and maintain system integrity when repairing or rebuilding line sets on compatible Bard equipment. Verify your unit model and the required connection style before ordering, since tubing size and thread style must match the existing piping for a proper seal and long term reliability.