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The NDL INDUSTRIES W4051 is a copper reducing tee designed for sweat-connect refrigeration and plumbing piping systems. It provides a three-way branch connection with a reduced outlet, allowing a single main run to feed a smaller branch line without additional fittings or adapters. The connection type is C X C X C, meaning all three ports accept copper tubing for soldered joints. The main run ports measure 1-1/8 inches and the branch outlet measures 5/8 inches. Licensed plumbers and HVAC technicians use this fitting in refrigerant line sets, hydronic systems, and domestic copper water distribution.
This reducing tee is suited for residential and light commercial applications where a copper main line must branch off to a smaller diameter line. Typical uses include refrigerant distribution headers, chilled water piping, and potable water supply runs where a reduced branch tap is required. All three ports use a solder-cup connection, making installation consistent with standard copper sweat work.
Designed as an OEM-style replacement or new-installation fitting for copper sweat piping systems requiring a 1-1/8 inches by 1-1/8 inches by 5/8 inches reducing tee connection.
Installation should be performed by a licensed plumber or HVAC technician familiar with copper sweat soldering practices. Shut off and depressurize the system completely before cutting into any existing line. Clean all mating surfaces with emery cloth and apply flux before soldering to ensure a leak-free joint. Work must comply with applicable local plumbing codes and, where refrigerant lines are involved, EPA Section 608 requirements.
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