Mueller Streamline CPL00878 Copper Reducing Coupling

Product Description

The MUELLER STREAMLINE CPL00878 is a wrot copper reducing coupling designed for sweat-solder connections in small-diameter copper tubing systems. At 1/4 inch by 3/16 inch with a C x C (copper-to-copper) end configuration, this fitting joins two different tube sizes in a single compact piece. Wrot copper construction delivers the pressure rating and corrosion resistance required for potable water, refrigeration, and light mechanical piping applications. The fitting meets ASME and NSF standards, making it suitable for systems where material compliance is required. Plumbers and HVAC technicians routinely use fittings like this for instrument lines, refrigerant service connections, and small-bore domestic water branch lines.

This reducing coupling is suited for residential and light commercial installations where 1/4 inch and 3/16 inch copper tubing must be joined with a permanent, soldered connection. Typical applications include low-pressure domestic water lines, HVAC condensate and instrument tubing, and any small-diameter copper piping run requiring a concentric reduction. The C x C end type is compatible with standard sweat-solder installation practices used throughout the plumbing and HVAC trades.

Key Features

• Wrot copper construction for high corrosion resistance and reliable sweat-solder joints
• 1/4 inch x 3/16 inch reducing configuration in a single fitting
• C x C (copper-to-copper) solder-end connections on both sides
• Meets ASME and NSF compliance standards for potable water and mechanical systems
• Compact form factor at 0.72 inches long and 0.48 inches wide

Compatibility

Designed as an OEM-style sweat-solder fitting compatible with standard 1/4 inch and 3/16 inch outside-diameter wrot copper tubing systems.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians using standard sweat-soldering tools including a propane or MAPP torch, lead-free solder, and flux rated for copper fittings. Shut off and depressurize the system and purge any remaining water from the line before applying heat to prevent steam pressure buildup in the joint. Clean both the tube ends and fitting sockets with emery cloth and apply flux evenly before soldering. Follow applicable local plumbing codes and ASME guidelines for joint preparation and solder material selection.

Technical Specifications

• Connection Size: 1/4 x 3/16 inches
• Connection Type: C x C (Solder)
• Material: Wrot Copper
• Actual Length/Depth: 0.72 inches
• Actual Width: 0.48 inches
• Actual Height: 0.48 inches
• Actual Weight: 0.01 pounds
• Standards / Compliance: ASME, NSF

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: CPL00878