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

1-1/4" x 1" x 1" Black Iron Reducing Tee – Threaded Fitting for Branching Applications

The 1-1/4" Black Iron Reducing Tee is a threaded pipe fitting used to create a 90-degree branch in steel piping systems while transitioning between pipe sizes. Manufactured from cast black malleable iron, it is suitable for non-potable water, gas, and air distribution systems where durability and mechanical strength are required.

This fitting features a reduced outlet for downsizing line branches and is internally threaded per ANSI B1.20.1 NPT standards. Its high-temperature tolerance and pressure capability make it appropriate for mechanical, HVAC, and fuel gas system applications that operate under demanding conditions.

Key Technical Features

• ✅ Cast Malleable Iron: Offers tensile strength and impact resistance under mechanical load and thermal cycling.
• ✅ Reducing Tee Configuration: Ideal for transitioning from a 1-1/4" main line to dual 1" branches within compact assemblies.
• ✅ NPT Threaded Ends: Female National Pipe Thread on all three ports ensures compatibility with standard carbon steel pipe.
• ✅ Black Finish: Uncoated for applications where corrosion protection is applied at the system level or not required.
• ✅ Approved for Gas: Commonly used in fuel gas systems per applicable building codes when properly sealed and tested.

Specifications

• Nominal Size: 1-1/4" x 1" x 1"
• Material: Malleable Black Iron
• Thread Type: FPT x FPT x FPT (ANSI B1.20.1)
• Pressure Rating: Up to 300 PSI (non-shock)
• Temperature Range: Suitable for systems up to 150°F for gas; higher with proper system design

Installation Guidance

Threaded connections should be assembled using a fuel gas-rated thread sealant or PTFE tape where permitted. Pipe ends must be clean and properly chamfered to ensure thread engagement and leak prevention. Torque specifications should be followed to avoid stress cracking. Suitable for use in rigid black pipe systems assembled per applicable mechanical and plumbing codes.

Typical Applications

Used in gas distribution lines, hydronic heating branches, and low-pressure air or oil systems. Appropriate for horizontal and vertical line splitting in systems requiring a size reduction and directional change from a main trunk to subsidiary lines.

Application Note

Black malleable fittings are widely specified in gas systems due to their pressure capacity and mechanical robustness. They should not be used in potable water systems unless treated or coated for corrosion resistance and listed for such use.

The 1-1/4" x 1" x 1" Black Iron Reducing Tee is engineered to support system durability and dimensional accuracy in branch line configurations. Its compatibility with pressurized air and gas systems makes it a reliable component in utility and infrastructure projects requiring long-term performance.