B K Mueller 511-330HC Galvanized Reducing Coupling

Product Description

The B K Mueller 511-330HC is a galvanized reducing coupling designed for joining threaded pipe sections of two different diameters. It connects a 1/2-inch pipe to a 1/8-inch pipe using standard NPT threads and provides a corrosion-resistant galvanized finish for durability in exposed or moisture-prone installations. This type of fitting is a standard component in plumbing, HVAC piping, and gas distribution systems where pipe size transitions are required. Licensed plumbers and pipefitters install this coupling as part of threaded pipe assemblies in both residential and light commercial applications.

This reducing coupling is suited for use in threaded pipe systems where a transition from 1/2-inch to 1/8-inch nominal pipe size is needed. Typical applications include water supply lines, compressed air distribution, low-pressure gas piping, and hydronic heating systems. The galvanized coating makes it appropriate for installations where bare iron fittings would be exposed to humidity or mild corrosion risk. It is sold in packages of 30 units, making it practical for contractors stocking fittings for multiple jobs.

Key Features

• Galvanized finish provides corrosion resistance in moisture-prone environments
• Reduces from 1/2-inch to 1/8-inch nominal pipe size in a single fitting
• Standard NPT threaded ends for compatibility with common threaded pipe systems
• Packaged in quantities of 30 units for contractor convenience
• Suitable for plumbing, HVAC, and low-pressure gas piping applications

Compatibility

Designed as an OEM-style replacement or standard-stock reducing coupling for threaded galvanized pipe systems requiring a 1/2-inch to 1/8-inch NPT transition.

Installation Notes

This fitting is installed by licensed plumbers or pipefitters working on threaded pipe systems. Shut off and depressurize the line before removing or installing any threaded fittings. Apply thread sealant tape or pipe dope to NPT threads before assembly in accordance with local plumbing or mechanical codes. Do not overtighten threaded connections, as galvanized fittings can crack under excessive torque.