Bk Mueller 520-776HC Black Iron Reducer 1-1/2 X 1-1/4 in

Product Description

The BK MUELLER 520-776HC is a black malleable iron reducer fitting designed to transition between 1-1/2 inch and 1-1/4 inch threaded pipe connections. Rated at Class 150 with a liquid and gas pressure rating of 300 psi, it is built for reliable service in gas, air, and water piping systems. The black finish is standard for gas line applications. Threaded end connections follow NPT standards, making installation straightforward with standard pipe wrenches and thread sealant. Licensed plumbers, pipefitters, and HVAC mechanics are the typical installers for this type of fitting.

This reducer fitting is used in residential and light commercial piping systems where a pipe size reduction is needed along a threaded iron pipe run. Common applications include natural gas distribution lines, compressed air systems, and water supply piping where malleable iron fittings are specified. The 1-1/2 inch to 1-1/4 inch reduction is a common sizing step-down in branch piping layouts.

Key Features

• Malleable iron construction with black finish for durability and gas line compatibility
• 300 psi liquid and gas pressure rating for a wide range of service conditions
• Class 150 classification meeting standard iron pipe fitting ratings
• Threaded end connections for straightforward NPT installation
• 1-1/2 inch to 1-1/4 inch reduction for common step-down piping configurations

Compatibility

Designed as an OEM-style replacement and standard fitting for threaded malleable iron pipe systems rated at Class 150, suitable for gas, air, and water service applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the International Plumbing Code or International Fuel Gas Code. Shut off gas or water supply and depressurize the line before removing or installing any fitting. Apply an appropriate thread sealant or pipe tape rated for the intended service medium to all threaded connections. Do not overtighten threaded connections, as this can damage the fitting threads on malleable iron fittings.