B K Mueller 520-206HN Black 45 Deg Elbow 1-1/4 in 5pk

Product Description

The B K Mueller Industries 520-206HN is a 1-1/4 inch black malleable iron 45 degree equal elbow designed for threaded pipe assemblies in gas, air, and general-purpose piping systems. This fitting changes flow direction by 45 degrees while maintaining a consistent bore size on both ends. Sold in a package of 5 units, it is a standard fitting used by plumbers, pipefitters, and mechanical contractors working on low-pressure gas distribution, compressed air lines, and industrial fluid systems. The black finish is standard for gas service applications and provides basic corrosion resistance in dry indoor environments.

This elbow is suited for residential and light commercial applications where a 45 degree directional change is needed in a threaded black iron piping run. Typical installations include natural gas supply lines, propane distribution, compressed air headers, and similar systems using Schedule 40 black iron pipe. The 1-1/4 inch size is commonly found in main gas supply runs and larger branch lines in both residential and commercial mechanical rooms.

Key Features

• 45 degree angle provides moderate directional change without sharp 90 degree turns, reducing pressure drop
• Equal end sizing at 1-1/4 inch on both ports maintains full bore flow through the fitting
• Black finish is standard for gas piping applications per common code requirements
• Threaded ends accept standard NPT pipe threads for straightforward assembly
• Sold in a package of 5 units, suitable for multi-fitting jobs or stocking

Compatibility

Designed as an OEM-style replacement or new-installation fitting compatible with standard 1-1/4 inch NPT threaded black iron pipe systems used in gas, air, and general-purpose low-pressure piping applications.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or gas technician in accordance with applicable codes such as the IFGC and local authority requirements. Always shut off and depressurize the gas or air supply before disassembling or assembling any threaded pipe fitting. Apply an appropriate thread sealant or PTFE tape rated for the intended service medium before threading fittings together. Do not overtighten threaded connections; hand-tighten and then wrench-tighten to a snug, leak-free fit and verify with a pressure test or approved leak detection method after installation.