3/4 inch x 3/4 inch x 1 inch Black Iron Reducing Tee Female x Female x Female

BLK MAL Reducing Tee – 3/4" x 3/4" x 1" Threaded FPT for Pipe Branching Applications

The 3/4" x 3/4" x 1" Black Malleable Iron Reducing Tee is designed to connect pipe sections at 90° angles where a change in diameter is required at the branch outlet. Manufactured from ASTM A197 malleable iron and coated with a protective black finish, this fitting supports mechanical strength and dimensional accuracy in low- to medium-pressure piping systems.

Its triple FPT (female pipe thread) configuration allows secure connections with NPT-threaded steel pipe in gas, oil, air, and water systems. The reducing side outlet accommodates a larger line-to-smaller branch transition, frequently used in vertical risers and horizontal distribution piping where flow reduction is necessary.

Key Performance Characteristics

• ✅ Full-Range Threaded Connections – Compatible with NPT threads conforming to ANSI/ASME B1.20.1 standards.
• ✅ Malleable Iron Construction – High tensile strength and impact resistance suitable for mechanical and utility applications.
• ✅ Reducing Side Outlet – Enables directional branching with size reduction, maintaining flow control and spatial efficiency.
• ✅ Black Oxide Finish – Intended for use in oil, gas, and air lines where corrosion protection is not required or provided externally.
• ✅ Manufactured to B16.3 Standards – Ensures proper fit, wall thickness, and alignment across interconnected components.

Installation Considerations

Use pipe joint compound or PTFE tape on male threads before assembly. Avoid over-torquing to reduce the risk of thread galling or distortion. This fitting is intended for rigid piping systems where fixed alignment and mechanical joining are required. Not intended for use with plastic piping or in potable water systems unless appropriately approved or lined.

Technical Specifications

• Nominal Sizes: Inlet 3/4" x Inlet 3/4" x Outlet 1"
• Type: Reducing Tee, FPT x FPT x FPT
• Material: Black Malleable Iron (ASTM A197)
• Standard Compliance: ASME B16.3 and B1.20.1
• Applications: Gas distribution, hydronic heating, compressed air, and non-potable water systems

Application Context

Frequently used in branch line takeoffs where a larger main run supplies a smaller outlet. Applicable in both residential and commercial plumbing layouts, including boiler loops, gas distribution manifolds, and low-pressure hydronic systems. The black finish is standard for systems not requiring corrosion-resistant treatment.

Material Note

Malleable iron offers favorable machinability, pressure resistance, and structural consistency. Its ability to absorb vibration and mechanical stress makes it well-suited for threaded metal-to-metal connections in rigid piping networks.

The BLK MAL Tee 3/4" x 3/4" x 1" is a standard-grade reducing tee used across mechanical and industrial installations requiring secure, pressure-capable branch connections with precise alignment and dimensional integrity.