B K Mueller 520-305HN Black Street Elbow 90 Degree 1 Inch

Product Description

The B K Mueller Industries 520-305HN is a 1-inch black malleable iron street elbow rated at 90 degrees, used to change pipe direction within a threaded black iron piping system. This fitting accepts a male-threaded pipe on one end and a female-threaded pipe on the other end, making it a street configuration that eliminates the need for an additional nipple in tight spaces. It is a standard component in gas distribution, compressed air, and industrial piping systems where durable, threaded black iron fittings are required. Licensed plumbers and pipefitters install this type of fitting during new construction and service work.

This fitting is suited for residential and light commercial black iron piping applications, including natural gas supply lines, propane distribution, and steam or air systems where black iron construction is specified. The street elbow configuration is particularly useful in close-quarters installations where a standard elbow-plus-nipple combination would not fit. It is sold in a package quantity of 5 units, making it practical for multi-point installations or service van stocking.

Key Features

• 90-degree street elbow configuration with male and female threaded ends for compact directional changes
• 1-inch nominal pipe size fits standard NPT threaded systems
• Black iron malleable construction for strength and compatibility with gas and air service
• Packaged in quantities of 5 per unit of measure for efficient stocking
• Threaded ends allow installation with standard pipe wrenches and pipe thread sealant

Compatibility

Designed as a standard OEM-style replacement or new-installation fitting for 1-inch NPT threaded black iron piping systems used in gas, air, and industrial piping applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, including the International Fuel Gas Code (IFGC) where gas piping is involved. Shut off gas or air supply and verify zero pressure at the line before disassembling any existing fittings. Apply an approved pipe thread sealant or PTFE tape rated for the service medium to all male threads before assembly. Do not over-tighten threaded connections, as malleable iron fittings can crack under excessive force.