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The NDL INDUSTRIES w1238 is a 3/4-inch copper female adapter configured in a C x FPT end pattern, meaning one end accepts a sweat (solder) copper connection and the other end is a female pipe thread. This fitting transitions a copper sweat line to a threaded female port, allowing connection to male-threaded valves, nipples, or fittings in plumbing and HVAC systems. It is fabricated from copper, which resists corrosion and handles the pressures and temperatures common in residential and light commercial water distribution, hydronic heating, and refrigeration piping applications. Licensed plumbers and HVAC technicians are the primary installers of this type of fitting.
The w1238 adapter is suited for potable water supply lines, domestic hot and cold distribution, hydronic heating loops, and similar systems where a copper sweat connection must transition to a female threaded port. The 3/4-inch size is one of the most common diameters in residential and light commercial rough-in work, making this adapter a standard component in new construction and retrofit projects alike.
Designed as an OEM-style replacement or standard-use fitting for 3/4-inch copper sweat systems requiring a female threaded transition port.
Installation is performed by a licensed plumber following applicable IPC and local plumbing codes. Shut off and drain the water supply before soldering. Clean and flux all mating surfaces before applying heat, and use lead-free solder where the fitting will contact potable water. Allow the joint to cool fully before restoring pressure to the line.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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