Bk Mueller 510-121HC 90 Reducing Elbow 3/8x1/4 in Galvanized

Product Description

The BK MUELLER 510-121HC is a Class 150 malleable iron 90-degree reducing elbow designed for threaded pipe systems carrying liquid, gas, or steam. The fitting transitions from a 3/8-inch inlet to a 1/4-inch outlet while making a full 90-degree directional change in the line. Rated at 300 psi for liquid and gas service and 150 psi for steam, it is built to handle the pressure demands of residential and light commercial plumbing, gas distribution, and HVAC piping. The galvanized finish provides corrosion resistance for extended service life. Licensed plumbers and pipefitters install this fitting as part of standard threaded iron pipe assemblies.

This reducing elbow is suited for threaded iron pipe installations in residential and commercial settings where a direction change and pipe size reduction are needed in the same fitting. Common applications include gas supply lines, compressed air systems, steam heating systems, and general-purpose liquid distribution. The Class 150 rating aligns with standard malleable iron pipe fitting systems used in both new construction and retrofit work.

Key Features

• 90-degree reducing elbow combines a direction change and size reduction in one fitting
• Rated 300 psi for liquid and gas, 150 psi for steam
• Class 150 malleable iron construction for durability under pressure cycling
• Galvanized finish resists corrosion in exposed or damp environments
• 3/8-inch inlet x 1/4-inch outlet - standard NPT threaded connections

Compatibility

Designed as an OEM-style replacement or standard component for Class 150 malleable iron threaded pipe systems using NPT fittings in liquid, gas, or steam service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code or International Plumbing Code where gas or water service is involved. Shut off the gas or water supply and depressurize the line fully before removing any existing fittings. Apply an appropriate thread sealant or PTFE tape rated for the service medium before making up the joint. Do not over-torque threaded connections on malleable iron fittings, as the material is strong but not tolerant of impact or over-stress at the threads.