Mueller Streamline COTRED443 Copper Reducing Tee

Product Description

The MUELLER STREAMLINE COTRED443 is a copper reducing tee designed for use in pressure piping systems handling water, hydronic heating fluid, or compatible gases. The fitting measures 4 inches by 4 inches on the run with a 3-inch reduced outlet, allowing a branch takeoff at a smaller diameter without the need for a separate reducer fitting. Sweat-solder end connections are standard for this fitting type. Plumbers and pipefitters install this component where a main line needs to branch to a reduced-diameter run, consolidating connections and reducing joint count in the assembly.

This reducing tee is suited for residential and commercial plumbing, hydronic heating distribution, and mechanical piping applications. The 4 by 4 by 3-inch configuration is commonly specified in larger-diameter domestic water systems, chilled water distribution, and radiant or baseboard heating loops where a main run must feed a smaller branch line. Installation is performed by licensed plumbers or pipefitters following applicable IPC or local plumbing code requirements.

Key Features

• 4-inch run by 3-inch branch configuration reduces branch diameter in a single fitting
• Copper construction provides corrosion resistance in water and hydronic service
• Sweat-solder end connections suit standard copper tube preparation and jointing practices
• Reduces total joint count compared to using a straight tee with a separate reducer

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 4-inch copper pressure piping systems requiring a 3-inch reduced branch outlet.

Installation Notes

Installation is performed by a licensed plumber or pipefitter. Shut off and depressurize the system and drain standing water from the pipe section before cutting and soldering. Clean and flux all mating surfaces per standard sweat-soldering practice and follow IPC and local code requirements for pressure testing after joining. Do not use open flame near combustible materials without proper shielding.

Technical Specifications

• Run Size: 4 inches x 4 inches
• Branch Size: 3 inches
• Connection Type: Sweat (solder)
• Material: Copper

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: COTRED443