Bmi Usa 35478 Malleable Iron Black Pipe Tee

Product Description

The BMI USA 35478 is a malleable iron black pipe tee designed for threaded pipe assemblies in plumbing, HVAC, and gas distribution systems. The reducing tee configuration connects a 1-1/2 inch run to a 1-1/4 inch outlet and a 3/4 inch branch, making it well suited for transitions between pipe sizes within a single fitting. The black iron finish indicates this fitting is intended for gas and air applications rather than potable water systems. At 1.04 pounds, the malleable iron construction provides the ductility needed to handle mechanical stress and thermal cycling without cracking.

This fitting is used in residential and light commercial installations where threaded black iron pipe is specified. Common applications include natural gas supply lines, propane distribution, compressed air systems, and steam or hydronic heating runs where a reducing branch connection is required. Licensed plumbers and pipefitters install this type of fitting in accordance with the International Fuel Gas Code or applicable local mechanical codes depending on the service type.

Key Features

• Malleable iron construction provides ductility and resistance to cracking under mechanical stress
• Black finish suitable for gas, air, and steam service applications
• Reducing tee configuration: 1-1/2 inch run, 1-1/4 inch outlet, 3/4 inch branch
• Threaded connection type for standard NPT pipe assemblies
• Compact, single-piece fitting reduces joint count in reducing branch runs

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for threaded black iron pipe systems using NPT connections in gas, air, and steam service applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in compliance with the applicable fuel gas, mechanical, or plumbing code for the jurisdiction. Shut off and isolate the gas or fluid supply completely before breaking into any existing pipe run. Apply an approved thread sealant or PTFE tape rated for the service type to all threaded joints before makeup. Do not over-torque the fitting, as malleable iron threads can be damaged by excessive force.

Technical Specifications

• Material: Malleable Iron
• Finish: Black
• Connection Size (Run): 1-1/2 inches
• Connection Size (Outlet): 1-1/4 inches
• Connection Size (Branch): 3/4 inches
• Weight: 1.04 pounds
• UPC: 777701354786

Standard Information

• Brand: BMI USA
• Manufacturer Part Number: 35478