B K/mueller Inds(import) 521-387HC Black Reducing Coupling

Product Description

The B K/MUELLER INDS(IMPORT) 521-387HC is a black reducing coupling designed to connect pipes of two different diameters in threaded piping systems. It transitions from a 2-inch female thread on one end to a 1-1/2-inch female thread on the other, allowing installers to step down pipe size within a run. This fitting is finished in black, consistent with standard black malleable iron pipe fittings used in gas distribution, compressed air, and industrial piping applications. It ships in a pack of 5 units, making it practical for service vans and multi-fixture jobs. Licensed plumbers and pipefitters are the typical installers of this type of fitting.

This reducing coupling is suited for residential and light commercial piping applications where a size reduction is needed mid-run. Common install scenarios include gas supply lines, compressed air distribution, and general industrial pipe assemblies where black iron fittings are specified. The pack quantity of 5 supports contractors working on multi-point installations or stocking service inventory for routine jobs.

Key Features

• Reduces from 2-inch to 1-1/2-inch female threaded connection
• Black finish consistent with standard black iron pipe fittings
• Sold in a pack of 5 units per package
• Threaded female connections on both ends for standard NPT pipe compatibility

Compatibility

Designed as an OEM-style replacement or standard fitting for use with threaded black iron pipe systems requiring a 2-inch to 1-1/2-inch reduction.

Installation Notes

This fitting is typically installed by a licensed plumber or pipefitter following applicable code requirements such as the IFGC or IPC. Shut off the gas or compressed air supply and depressurize the line fully before removing any existing fittings. Apply an approved thread sealant or PTFE tape to male threads before making up the joint. Inspect the completed connection for leaks before returning the system to service.