Nibco b179300 Copper Flush Bushing 3/4x3/8 Swt X Fpt

Product Description

The NIBCO b179300 is a cast copper flush bushing designed to reduce from a 3/4-inch sweat fitting (FTG) connection to a 3/8-inch female pipe thread (FPT) connection. This fitting is used to transition between copper sweat systems and threaded pipe connections within a single compact component. The flush bushing profile keeps the reduction close and tight, minimizing added length in tight installations. Licensed plumbers and pipefitters install this fitting in residential and light commercial potable water, hydronic heating, and refrigeration piping systems where a threaded-to-sweat transition is required.

This bushing is suited for installations where a sweat-side inlet must connect to a female-threaded outlet, such as transitioning from copper branch lines to threaded valves, gauges, or threaded fittings. The 3/4-inch sweat end accepts standard copper tubing and is soldered in place, while the 3/8-inch FPT end accepts a male-threaded component. It is appropriate for both new construction rough-in work and retrofit plumbing repairs requiring a size reduction with a thread transition.

Key Features

• Cast copper construction for reliable soldered joints and corrosion resistance in water systems
• Flush bushing profile minimizes overall fitting length in confined spaces
• 3/4-inch sweat fitting (FTG) inlet for standard copper tube soldering
• 3/8-inch female pipe thread (FPT) outlet for threaded component attachment
• Compatible with potable water, hydronic, and light refrigeration copper piping systems

Compatibility

Designed as an OEM-style replacement or standard-fit component for copper sweat piping systems requiring a 3/4-inch to 3/8-inch sweat-to-female-thread reduction bushing.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and fully drain the line before soldering to ensure a dry, clean joint. Clean and flux all sweat surfaces before applying heat, and allow the joint to cool completely before restoring pressure. Thread connections should be made with appropriate thread sealant or PTFE tape on the male threads before engagement.

Technical Specifications

• Inlet Size: 3/4 inches
• Outlet Size: 3/8 inches
• Inlet Connection Type: Sweat Fitting (FTG)
• Outlet Connection Type: Female Pipe Thread (FPT)
• Material: Cast Copper
• Fitting Style: Flush Bushing

Standard Information

• Brand: NIBCO
• Manufacturer Part Number: b179300