B K Mueller 520-005HN 1 in Black 90 Degree Elbow 10pk

Product Description

The B K Mueller Industries 520-005HN is a 1-inch black malleable iron 90-degree equal elbow designed for threaded pipe assemblies in gas, air, and compatible fluid distribution systems. This fitting changes pipe direction by 90 degrees while maintaining a consistent 1-inch bore through both ports. It ships in a package of 10 units, making it a practical stock item for contractors and service technicians who routinely work with black iron pipe. The black finish is standard for gas piping applications where corrosion resistance and code compliance are required. Plumbers, pipefitters, and HVAC installers are the primary trades using this fitting.

This elbow is suited for residential and light commercial applications involving black iron threaded pipe systems. Common install scenarios include natural gas and propane supply lines, compressed air distribution, and general-purpose piping where NPT-threaded fittings are specified. The equal-elbow configuration means both inlet and outlet share the same 1-inch nominal pipe size, with no reduction in flow path. This fitting is sold in a 10-unit package, which is a standard quantity for replenishing a service van or job-site supply.

Key Features

• 90-degree turn changes pipe direction without reducing nominal pipe size
• Equal elbow design: both ports are 1-inch nominal pipe size (NPT threaded)
• Black finish standard for gas piping and compressed air applications
• Sold in a package of 10 units per order
• Package weight of 5.72 pounds for 10-unit pack

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for 1-inch NPT threaded black iron pipe systems in residential and commercial gas, air, and fluid piping applications.

Installation Notes

Installation of black iron pipe fittings should be performed by a licensed plumber, pipefitter, or qualified HVAC technician in accordance with applicable local codes, the International Fuel Gas Code (IFGC), or the International Plumbing Code (IPC). Shut off and verify zero pressure on the gas or fluid supply before disassembling any portion of the piping system. Apply an approved pipe thread sealant or PTFE tape rated for the intended service to all male NPT threads before assembly. Do not over-tighten threaded connections; hand-tight plus the appropriate number of turns with a pipe wrench is sufficient to achieve a leak-free joint.