Mueller Streamline BUS00979 Flush Copper Bushing

Product Description

The MUELLER STREAMLINE BUS00979 is a flush-pattern copper bushing designed to reduce pipe connections in copper sweat systems. It transitions from a 1/2-inch fitting (FTG) end to a 1/4-inch cup (C) end, allowing a technician to step down tubing size within a run without adding extra fittings. At 0.05 pounds and measuring 0.62 inches in height and width with a 0.56-inch depth, this compact bushing fits tight spaces common in residential and light commercial plumbing and HVAC refrigerant piping. It meets multiple ASME standards, confirming dimensional and pressure integrity for sweat-soldered copper assemblies. Plumbers and HVAC technicians are the primary installers.

This bushing is suited for residential and light commercial applications where copper tubing runs require a size reduction at a fitting junction. Typical install scenarios include domestic water distribution, hydronic heating systems, and HVAC refrigerant line connections where a 1/2-inch FTG socket must accept 1/4-inch tubing. The flush design keeps the bushing seated cleanly inside the receiving fitting, minimizing protrusion into the pipe bore and maintaining flow characteristics through the transition point.

Key Features

• Flush-pattern design seats fully inside the receiving fitting socket
• FTG x C connection reduces from 1/2-inch fitting end to 1/4-inch cup end
• Lightweight at 0.05 pounds for easy handling in confined spaces
• Compliant with ASME B16.15, B16.18, B16.22, B16.24, B16.50, and ASME B1.20.1
• Compatible with standard sweat-solder copper installation methods

Compatibility

Designed as an OEM-style replacement and standard-service fitting for copper sweat systems requiring a 1/2-inch FTG to 1/4-inch C reducing bushing connection.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians using standard copper sweat-soldering tools including a torch, flux, and lead-free solder per applicable codes. Shut off and depressurize the water or refrigerant system fully before cutting into any existing line. Clean and flux both the bushing and the receiving fitting socket before applying heat. Follow local plumbing codes and ASME standards for solder joint preparation and inspection.

Technical Specifications

• Connection Size: 1/2 x 1/4 inches
• Connection Type: FTG x C
• Actual Height: 0.62 inches
• Actual Width: 0.62 inches
• Actual Length/Depth: 0.56 inches
• Actual Weight: 0.05 pounds
• Standards/Compliance: ASME B16.15, ASME B16.18, ASME B16.22, ASME B16.24, ASME B16.50, ASME B1.20.1

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: BUS00979