Macomb Group Approved 4X3.BFB 4x3 Black Malleable Iron Flush Bushing

Product Description

The MACOMB GROUP APPROVED 4X3.BFB is a standard black malleable iron flush bushing designed to reduce a 4-inch pipe thread down to a 3-inch pipe thread in a flush-mount profile. Malleable iron construction gives the fitting the strength and ductility needed to handle the mechanical stress common in threaded pipe systems. The flush bushing design eliminates the hex shoulder found on standard hex bushings, keeping the fitting low-profile where space is tight. This type of fitting is installed by plumbers and pipefitters working on gas, water, and general-purpose piping systems.

This flush bushing is suited for use in both residential and light commercial piping installations where a 4-inch to 3-inch threaded reduction is required in a compact space. It is particularly useful in applications where a hex bushing would protrude too far beyond the fitting or valve body. Black malleable iron fittings of this type are commonly found in natural gas distribution lines, fire protection piping, and steam systems where iron pipe is the standard material.

Key Features

• Flush bushing profile reduces pipe thread size without adding external hex shoulder bulk
• 4-inch male NPT to 3-inch female NPT reduction
• Black malleable iron construction resists mechanical stress and vibration
• Standard-duty rating appropriate for typical threaded iron pipe systems
• Compatible with standard NPT threaded fittings and valves

Compatibility

Designed as an OEM-style replacement or standard stock fitting for use in threaded malleable iron pipe systems requiring a 4-inch to 3-inch reduction.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) where required. Shut off and depressurize the piping system fully before removing or installing any threaded fittings. Apply a code-approved pipe thread sealant or PTFE tape to the male threads before assembly. Do not overtighten threaded malleable iron fittings, as this can crack the fitting body.