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The MUELLER INDUSTRIES BDNA-15603 is a wrot copper pipe adapter designed to connect a 3/8 inch copper sweat (C) end to a 1/2 inch male threaded (M) fitting. Wrot copper construction provides a dense, wrought grain structure that offers reliable pressure ratings and long service life in potable water and mechanical piping systems. This adapter is used where a copper tubing run must transition to a male-threaded connection point, such as at a valve, fixture supply, or equipment port. Licensed plumbers and HVAC technicians install this fitting during rough-in work and equipment connections.
This adapter is suited for residential and light commercial plumbing and hydronic applications. It handles the common transition from 3/8 inch copper tubing to a 1/2 inch male threaded component. Typical install scenarios include fixture supply lines, refrigeration or HVAC equipment hookups, and general plumbing rough-in where a sweat-to-male-thread transition is required. The compact size makes it a standard stocking item for service vans and job-site supplies.
Designed as an OEM-style replacement or new-installation fitting for copper plumbing and hydronic systems requiring a sweat-to-male-thread adapter transition at 3/8 inch by 1/2 inch sizing.
Installation is performed by licensed plumbers or qualified HVAC technicians in accordance with applicable IPC or IFGC codes. Shut off the water supply and fully depressurize and drain the line before soldering. Use proper flux and lead-free solder meeting NSF 61 requirements for potable water applications. Allow the joint to cool completely before restoring pressure and inspecting for leaks.
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