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The MUELLER STREAMLINE COADCMIPRED1234 is a copper male reducing adapter designed to connect a solder cup (C) end to a male NPT threaded connection. The fitting transitions a 1/2-inch copper sweat connection to a 3/4-inch male NPT thread, making it a practical solution when adapting copper tubing runs to threaded pipe fittings. Manufactured from ASTM B75 Alloy C12200 copper, this adapter is lead-free and dezincification resistant. It is third-party certified to NSF/ANSI 61 Annex G, ASME B16.22, and MSS SP-104, and meets NFPA 99 requirements for health care facility gas and vacuum systems as well as Compressed Gas Association Pamphlet G4.1 for medical gas applications. Plumbers and mechanical contractors are the typical installers.
This reducing adapter is suited for residential and commercial plumbing, hydronic, and medical gas piping systems where a copper sweat line must transition to a threaded male connection at a different nominal size. Its certifications make it appropriate for use in health care facilities and other regulated environments where verified material and performance standards are required. The fitting is part of the Series 604R product line.
Designed as an OEM-style replacement and standard-service fitting for copper sweat-to-male NPT reducing applications in residential and commercial plumbing and mechanical systems.
Installation is performed by a licensed plumber or mechanical contractor. Shut off the water or gas supply and depressurize the line before soldering or making any connections. The solder cup end requires proper flux application and a clean, deburred tube end before sweating; the male NPT thread end should be wrapped with thread sealant tape rated for the intended service. Medical gas installations must comply with NFPA 99 and applicable local codes.
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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