Bk Mueller 520-444HC Black Reducer Tee 3/4x1/4 Threaded

Product Description

The BK MUELLER 520-444HC is a black malleable iron reducer tee fitting designed for threaded pipe systems in gas and liquid distribution applications. Rated at Class 150 with a pressure rating of 300 psi, this fitting provides a durable, corrosion-resistant connection point where a 3/4-inch line reduces to a 1/4-inch branch. The black finish is standard for gas piping installations. Female Iron Pipe (FIP) threads on all connections ensure a secure, leak-resistant assembly when properly torqued and sealed. Plumbers, pipefitters, and gas service technicians install this type of fitting in both new construction and retrofit scenarios.

This reducer tee is suited for residential and light commercial piping systems carrying gas or liquid media. It is commonly installed in natural gas distribution lines, propane systems, and water supply piping where a branch takeoff with a size reduction is required. The 3/4-inch main run connects to a 1/4-inch branch outlet, making it practical for instrumentation taps, pressure gauge ports, or low-flow branch lines. The Class 150 malleable iron construction meets standard requirements for these system types.

Key Features

• Malleable iron construction provides strength and impact resistance in threaded piping systems
• Black finish standard for gas piping applications per common installation codes
• 300 psi liquid and gas pressure rating under Class 150 classification
• Female Iron Pipe (FIP) threads on all ports for compatibility with standard threaded pipe
• Reducer tee configuration allows a 3/4-inch main run with a 1/4-inch branch outlet in a single fitting

Compatibility

Designed as an OEM-style threaded fitting for Class 150 malleable iron piping systems using standard FIP-threaded pipe in 3/4-inch and 1/4-inch sizes.

Installation Notes

Installation should be performed by a licensed plumber or gas fitter in accordance with applicable local codes, the International Fuel Gas Code (IFGC), or the International Plumbing Code (IPC) as appropriate. Shut off all gas or fluid supply and relieve system pressure completely before removing or installing any threaded fitting. Apply an approved pipe thread sealant or PTFE tape rated for the media being conveyed. Do not over-tighten or use pipe wrenches on the branch outlet, as malleable iron fittings can crack under excessive force.