B K Mueller 520-501HC Black 45 Degree Street Elbow 1/4 in

Product Description

The B K Mueller Industries 520-501HC is a black 45-degree street elbow designed for use in low-pressure gas piping, compressed air, and general industrial piping systems. This malleable iron fitting connects directly to threaded pipe, with one male NPT end and one female NPT end, allowing a 45-degree direction change without a separate nipple. The fitting ships in a package of 25 units, making it practical for contractors stocking up for multi-unit jobs or service inventory. Licensed plumbers and pipefitters are the primary installers for this type of fitting in residential and light commercial applications.

This 45-degree street elbow is suited for residential and light commercial gas distribution piping, compressed air lines, and similar threaded-pipe systems where space is limited and a direct fitting-to-fitting connection is required. The street configuration eliminates the need for a short nipple between fittings, reducing overall assembly length and simplifying installation in tight spaces. It is available in a package quantity of 25, making it well suited for wholesale and trade purchases.

Key Features

• 45-degree street elbow configuration with one male NPT and one female NPT end
• Black finish suitable for gas and air piping applications
• 1/4 inch pipe size for small-diameter threaded systems
• Malleable iron construction for durability in threaded-pipe assemblies
• Sold in a package quantity of 25 units

Compatibility

Designed as an OEM-style replacement and standard trade fitting for 1/4 inch NPT threaded pipe systems in residential and light commercial gas and air piping applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC) for gas piping applications. Shut off and de-pressurize the piping system completely before disassembling or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape rated for the specific service medium before making up threaded connections. Inspect threads for damage before assembly and do not over-tighten, as malleable iron fittings can crack under excessive force.