Bk Mueller 520-186HC 90 Reducing Elbow 2x1-1/4 in Threaded

Product Description

The BK MUELLER 520-186HC is a black malleable iron 90 degree reducing elbow rated for Class 150 service. It transitions from a 2-inch female iron pipe (FIP) thread to a 1-1/4-inch FIP thread, making a right-angle change of direction in threaded pipe systems. Rated to 300 psi for both liquid and gas service, this fitting handles the pressures common in natural gas, compressed air, and water distribution piping. The black finish is standard for gas-line applications. Plumbers, pipefitters, and HVAC technicians install this type of fitting where a threaded run needs to reduce and turn simultaneously, eliminating the need for a separate coupling and elbow.

This reducing elbow is suited for residential and light commercial gas distribution, steam, air, and water piping systems where Class 150 malleable iron fittings are specified. Typical applications include branch takeoffs in gas supply lines, boiler piping, and compressed air headers. The 2 x 1-1/4-inch size is a common reducing combination in gas appliance rough-in work and mechanical room piping.

Key Features

• 90 degree reducing elbow combines a direction change and a pipe size reduction in a single fitting
• Malleable iron construction rated to 300 psi liquid and gas pressure
• Class 150 classification suitable for standard residential and commercial piping service
• Female iron pipe (FIP) threaded connections on both ends for standard threaded pipe assembly
• Black finish meets typical code requirements for gas piping identification
• 2 x 1-1/4-inch size fits a common reducing transition in gas and mechanical piping layouts

Compatibility

Designed as a standard Class 150 malleable iron threaded fitting compatible with 2-inch and 1-1/4-inch FIP threaded pipe in gas, air, steam, and water piping systems where malleable iron fittings are specified.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable local codes and IFGC requirements for gas piping or IPC requirements for water and air service. Shut off and depressurize the line fully before disassembling or installing any threaded fitting. Apply an approved thread sealant or PTFE tape rated for the service medium to all male threads before assembly. Tighten to a firm, leak-free make-up using pipe wrenches - do not overtighten malleable iron fittings.