2-1/2 inch x 1-1/2 inch Black Iron Reducing Coupling Female x Female

2-1/2 Inch x 1-1/2 Inch Black Iron Reducing Coupling – Threaded FIP x FIP

This black malleable iron reducing coupling is used to connect two female-threaded steel or iron pipe sections of different diameters in threaded piping systems. With a 2-1/2 inch FIP inlet and 1-1/2 inch FIP outlet, it allows for direct size transitions in water, steam, air, or gas lines across industrial, commercial, and mechanical systems.

The coupling is manufactured from malleable iron and coated with a protective black finish to resist corrosion in non-potable and natural gas service lines. Threads are machined to NPT specifications for full engagement and reliable sealing when used with appropriate joint compounds.

Application and Performance Characteristics

• ✅ Standard Tapered NPT Threads – Provides tight, mechanically sound joints with threaded piping systems.
• ✅ Malleable Iron Body – Designed to handle internal pressure in gas, steam, and compressed air systems.
• ✅ Black Finish – Suitable for use in non-corrosive or closed-system environments where galvanization is not required.
• ✅ Pipe Size Transition – Used where larger system mains must interface with smaller distribution branches.

Installation Requirements

Ensure all mating threads are clean and free of debris prior to assembly. Apply thread sealant or PTFE tape as specified for the media being conveyed. Tighten using appropriate pipe wrenches while avoiding over-torque, which may cause stress cracking or thread damage.

This fitting is not intended for use in potable water systems unless otherwise specified and listed. Consult project specifications and local code requirements before use in pressure systems.

Common Use Cases

• Connecting gas appliance branches to main service lines
• Steam line reductions in HVAC systems
• Compressed air systems in industrial facilities
• Transitioning pipe diameters in mechanical distribution systems

Material & Compliance Note

Malleable iron is often selected for its excellent mechanical properties, including shock resistance and compressive strength. Black fittings are typically used where corrosion protection from galvanization is not needed and where higher operating temperatures are present.

Technical Specifications

• Material: Malleable black iron
• Inlet: 2-1/2 inch FIP
• Outlet: 1-1/2 inch FIP
• Thread Standard: ANSI/ASME B1.20.1 (NPT)
• Finish: Black coating (non-galvanized)
• Pressure Rating: Suitable for low to medium pressure gas, air, and steam systems