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The NDL INDUSTRIES W3067 is a 45-degree copper elbow fitting designed for copper-to-copper (C x C) sweat connections in refrigeration, HVAC, and plumbing piping systems. With a 3-1/8-inch connection size, this elbow is sized for large-diameter copper tubing commonly found in commercial and industrial refrigeration circuits, chilled water lines, and large-tonnage HVAC systems. It redirects piping runs at a 45-degree angle, allowing for gradual directional changes that minimize pressure drop and turbulence compared to sharper 90-degree fittings. Installation is performed by licensed HVAC technicians, refrigeration mechanics, or journeyman plumbers using standard sweat-solder or brazed-joint methods.
This elbow is suited for large-bore copper piping applications in commercial refrigeration, chiller systems, and industrial HVAC installations where 3-1/8-inch OD copper tubing is specified. The C x C connection type means both ends accept standard copper tube for soldered or brazed joining. Sold in a box quantity of 2, making it practical for jobs requiring paired fittings on a single piping run or loop.
Designed as an OEM-style sweat fitting for large-diameter copper piping systems using 3-1/8-inch OD copper tube with C x C (copper by copper) end connections.
Installation should be performed by a licensed HVAC technician, refrigeration mechanic, or journeyman plumber following applicable mechanical and plumbing codes. Purge and recover any refrigerant or drain the piping system completely before cutting into an existing line. For refrigeration applications, nitrogen-purge the line during brazing to prevent internal oxidation scale. Ensure all joint surfaces are clean, deburred, and properly fluxed before soldering or brazing to achieve a leak-free connection.
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