B K Mueller 520-007HN Black 90 Degree Elbow 1-1/2 in

Product Description

The B K Mueller Industries 520-007HN is a black 90 degree equal elbow fitting used to make a right-angle direction change in threaded black iron pipe systems. This type of malleable iron elbow is a standard component in gas distribution piping, fire suppression headers, and industrial plumbing systems. It accepts the same nominal pipe size on both ends, making it a true equal elbow. Licensed plumbers, pipefitters, and gas technicians install this fitting as part of threaded black iron assemblies in both residential and light commercial applications. The package contains 5 fittings per unit, with a combined package weight of 5.76 pounds.

This fitting is suited for use in black iron threaded pipe systems where a 90 degree change in direction is required. Common applications include natural gas and propane supply lines, compressed air distribution, and hydronic heating supply and return piping. It is a frequent stock item for plumbing and mechanical contractors who maintain supply of standard black iron fittings for service calls and new construction. The equal-end configuration means both inlet and outlet share the same 1-1/2 inch nominal pipe thread size.

Key Features

• 90 degree equal elbow geometry with matching 1-1/2 inch nominal thread on both ends
• Black iron finish suited for gas piping and non-potable applications
• Standard NPT threaded connections for compatibility with common black iron pipe stock
• Sold in a package of 5 fittings for contractor stocking convenience
• Package weight of 5.76 pounds for straightforward freight and job-site logistics

Compatibility

Designed as an OEM-style drop-in replacement for standard 1-1/2 inch NPT black malleable iron 90 degree equal elbows used in threaded black iron pipe systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IFGC or IPC. Shut off and isolate the gas or fluid supply before disassembling any threaded connection. Apply appropriate thread sealant or PTFE tape rated for the intended service to all male NPT threads before assembly. Do not overtighten threaded fittings; use a pipe wrench and follow standard trade practice for thread engagement on malleable iron.