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The MUELLER STREAMLINE CPL00033 is a 1-inch wrot copper coupling with a staked stop, designed for sweat-solder (CxC) connections in copper piping systems. The staked stop positions pipe ends at the correct insertion depth, ensuring consistent, repeatable joints without guesswork. Built from wrot copper, this fitting offers high strength and excellent solderability for potable water, hydronic heating, and general plumbing lines. It meets ASME and NSF standards, making it suitable for installations where code compliance is required. Licensed plumbers and HVAC technicians install this fitting as part of new construction, retrofit, or repair work on copper distribution systems.
This coupling is used in residential and light commercial plumbing and hydronic applications where a full-bore, in-line copper joint is needed. The 1-inch CxC configuration accommodates standard 1-inch copper tube and is a common size in main supply runs, branch lines, and mechanical room piping. The staked internal stop prevents over-insertion and supports uniform solder fillet formation around the full circumference of the joint.
Designed as an OEM-style replacement or new-installation fitting for 1-inch copper piping systems using sweat-solder CxC connections in residential and commercial plumbing and hydronic applications.
Installation is performed by a licensed plumber following applicable IPC or local plumbing code requirements. Shut off and depressurize the water supply and fully dry the pipe before soldering. Clean pipe ends and fitting socket with emery cloth and apply flux before sweating the joint. Do not apply heat to a fitting with water present, as moisture prevents proper solder flow and bond formation.
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