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The NDL INDUSTRIES W1079 is a copper reducing coupling designed to join two different-diameter copper tubing runs in a single soldered connection. It transitions from a 2-1/8-inch end to a 5/8-inch end using a C x C (copper sweat) connection on both sides. This fitting is a standard component in refrigeration, HVAC, and plumbing piping systems where a line must step down in size. Licensed plumbers and HVAC technicians install this type of fitting during new construction, system retrofits, and repair work involving copper tubing.
This reducing coupling is suited for residential and light commercial applications where copper tubing diameters must be reduced within a run. The C x C connection type requires soldering on both ends, making it compatible with standard sweat-fitting installation practices common in hydronic, refrigerant, and potable-water piping work. It is packaged in a box quantity of 15 units, making it practical for contractors stocking a service van or job site.
Designed as an OEM-style replacement or new-installation fitting compatible with standard copper tubing systems using C x C sweat connections at 2-1/8-inch and 5/8-inch nominal sizes.
This fitting is installed by a licensed plumber or HVAC technician using standard copper sweat-soldering practices. Shut off the water or refrigerant supply and relieve system pressure before cutting into any existing line. Clean and flux both the tubing ends and the fitting sockets thoroughly before applying heat. Follow applicable local codes, IPC, or IFGC guidelines for the system type being serviced.
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