Mueller Streamline COTRED1143412 Copper Reducing Tee

Product Description

The MUELLER STREAMLINE COTRED1143412 is a copper reducing tee designed for use in potable water, hydronic heating, and plumbing distribution systems. This fitting connects three lines at a junction point while stepping down across all three openings: a 1-1/4 inch run inlet, a 3/4 inch run outlet, and a 1/2 inch branch outlet. The reducing configuration allows a single fitting to transition between multiple pipe sizes without additional reducers or couplings. Licensed plumbers and pipefitters install this type of fitting during new construction and remodel work where supply lines branch off a main distribution run at differing diameters.

This reducing tee is suited for residential and light commercial plumbing applications where copper distribution piping changes size at a branch point. Typical installations include domestic hot and cold water supply systems, radiant heating loops, and in-wall or under-slab rough-in work. The 1-1/4 x 3/4 x 1/2 inch sizing makes it a common choice where a larger main line feeds a reduced branch to a fixture or zone valve.

Key Features

• Reducing tee configuration handles three different pipe sizes in a single fitting
• 1-1/4 inch run inlet x 3/4 inch run outlet x 1/2 inch branch outlet
• Copper construction provides corrosion resistance and long service life in water systems
• Eliminates the need for separate reducer couplings at branch transitions
• Compatible with standard sweat (solder) joining methods used in copper piping work

Compatibility

Designed as an OEM-style replacement and standard-use fitting for copper plumbing systems using 1-1/4 inch, 3/4 inch, and 1/2 inch pipe sizes joined by sweat soldering.

Installation Notes

Installation is performed by a licensed plumber using standard copper sweat-soldering tools including a torch, flux, and lead-free solder meeting ASTM B32 and local plumbing code requirements. Shut off the water supply and fully drain the affected lines before cutting and fitting. Follow local IPC or UPC code requirements for solder composition on potable water systems. Do not overtighten or force-fit the tee onto pipe ends; ensure pipe is properly reamed, deburred, and cleaned before applying flux and heat.

Technical Specifications

• Run Inlet Size: 1-1/4 inches
• Run Outlet Size: 3/4 inches
• Branch Outlet Size: 1/2 inches
• Material: Copper
• Fitting Type: Reducing Tee
• Connection Type: Sweat (Solder)

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: COTRED1143412