B K Mueller 511-332HN Galvanized Reducing Coupling

Product Description

The B K Mueller Industries 511-332HN is a galvanized reducing coupling designed to connect pipe of two different diameters in a threaded piping system. It transitions from a 1/2-inch female thread on one end to a 3/8-inch female thread on the other, allowing a reduction in line size without additional fittings. The galvanized steel construction provides corrosion resistance suitable for water supply, gas distribution, and general plumbing applications. Licensed plumbers and pipefitters install this fitting in residential and light commercial systems where threaded iron pipe is standard. It ships in a package of 5 units.

This reducing coupling is used in threaded galvanized pipe systems where a line size change is required mid-run. Common applications include water supply lines, natural gas distribution piping, and compressed air systems that use standard NPT-threaded black or galvanized iron pipe. It is appropriate for both new construction and repair or retrofit work in residential and light commercial settings.

Key Features

• Reduces from 1/2-inch female NPT to 3/8-inch female NPT in a single fitting
• Galvanized steel construction resists corrosion in wet and humid environments
• Standard NPT threads ensure compatibility with common threaded pipe and fittings
• Sold in a package of 5 units for shop stock or service truck inventory
• Compact coupling profile minimizes added length to the pipe run

Compatibility

Designed as an OEM-style replacement or standard stocking fitting for threaded galvanized iron pipe systems using 1/2-inch and 3/8-inch NPT connections.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the supply line before removing any existing fittings. Apply an approved thread sealant or PTFE tape to the male threads before making up the joint. Do not over-tighten threaded joints, as this can crack fittings or distort threads.