B K Mueller 521-974HN Hex Bushing 1-1/2 X 3/4 Inches 5 Pack

Product Description

The B K Mueller Industries 521-974HN is a hex bushing reducer fitting used to connect two different pipe sizes in threaded plumbing systems. This bushing reduces a 1-1/2 inch female thread down to a 3/4 inch male thread, allowing plumbers to transition between pipe sizes without additional adapters. The hex body profile provides a solid grip point for wrench installation and removal. Sold in a package of 5 units, it is a standard consumable for commercial and residential plumbing rough-in and repair work. Licensed plumbers and pipefitters are the primary installers of this type of fitting.

Hex bushings of this size are commonly used in water supply, drain, and gas distribution piping where a threaded reduction is needed between two pipe runs. Typical install scenarios include reducing manifold outlets, transitioning between pipe branch sizes, and connecting fixtures or valves with smaller inlet threads to larger threaded pipe runs. This fitting is suited for both new construction and retrofit plumbing applications.

Key Features

• Reduces 1-1/2 inch female thread to 3/4 inch male thread in a single fitting
• Hex body profile allows standard wrench engagement for secure installation and removal
• Sold in a package of 5 units for multi-fixture jobs and service stock
• Compact form factor fits into tight spaces where a full coupling would not

Compatibility

Designed as an OEM-style replacement and standard threaded hex bushing for residential and light commercial plumbing systems using 1-1/2 inch to 3/4 inch NPT threaded pipe connections.

Installation Notes

Installation is performed by a licensed plumber following applicable IPC or local plumbing code requirements. Shut off the water supply and depressurize the line before threading in the bushing. Apply thread sealant tape or pipe dope to the male threads before installation. Do not overtighten, as this can crack fittings or damage threads.