Mueller Streamline CORED2122 Copper Reducing Coupling

Product Description

The MUELLER STREAMLINE CORED2122 is a copper reducing coupling designed to connect two different pipe diameters in a sweat-soldered (C x C) configuration. It transitions from a 2.5-inch socket on one end to a 2-inch socket on the other, allowing a plumber to step down copper pipe sizes within a water supply or hydronic system. The C x C ends accept standard copper tubing for a clean, torch-soldered joint. This fitting is a standard component in residential and light commercial plumbing rough-in and repipe work.

This reducing coupling is suited for water distribution lines, hydronic heating loops, and similar closed-loop or potable water systems where a pipe size reduction is required mid-run. It is typically installed by licensed plumbers during new construction, renovation, or repair work where supply line sizing changes between runs. Both ends use the cup-and-solder (C x C) connection method, requiring standard copper fittings preparation and lead-free solder per applicable code.

Key Features

• Reduces from 2.5-inch to 2-inch copper pipe in a single fitting
• C x C ends for sweat-solder connection on both sides
• Copper construction provides corrosion resistance in potable water and hydronic applications
• Compatible with standard Type L and Type M copper tubing

Compatibility

Designed as an OEM-style replacement and standard-use fitting for copper piping systems requiring a 2.5-inch to 2-inch reducing connection with cup-by-cup solder joints.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and IPC requirements. Shut off the water supply and depressurize the line before cutting or soldering. Clean and flux all mating surfaces before applying heat, and use lead-free solder for potable water applications as required by code. Allow the joint to cool fully before restoring pressure to the system.

Technical Specifications

• Inlet Size: 2.5 inches
• Outlet Size: 2 inches
• Connection Type: C x C (Sweat Solder)
Material: Copper

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: CORED2122