The STZ Industries 4 in. FIP x 2-1/2 in. FIP Black Malleable Iron Reducing Coupling is built to seal, adapt, and endure in demanding piping systems. Crafted from durable malleable iron with a sleek black finish, this reducing coupling smoothly joins pipes of different sizes while standing up to real-world use.
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Material: Malleable iron for impact resistance and long-term reliability.
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Finish: Black coating that hides wear and provides additional corrosion resistance on exposed installations.
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Ends and sizes: Two FIP (Female Iron Pipe) ends, sized 4 in. and 2-1/2 in., to transition between different pipe diameters.
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Type: Reducing coupling designed to connect a 4 in. pipe to a 2-1/2 in. run without separate adapters.
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Maximum pressure: Rated up to 300 psi, suitable for typical domestic and light commercial systems.
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Maximum temperature: Rated up to 150°F, appropriate for hot and cold water applications within that range.
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Lead content: Lead-free average content, aligning with safety and up-to-code expectations.
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Packaging: Bagged for protection and convenient handling on job sites.
Where this coupling shines: when you need a reliable, code-friendly way to reduce from a 4" line to a 2-1/2" run in plumbing, heating, or water distribution setups. It’s ideal for retrofits, repair projects, or new builds where a sturdy, threaded connection matters more than cosmetic polish.
Why choose this STZ coupling over other options? The malleable iron construction delivers robust performance under pressure changes and vibrations common in everyday installations. The black finish not only looks professional but adds an extra layer of protection against surface corrosion. With a clear 4 in. to 2-1/2 in. FIP configuration, you get a straightforward install path that minimizes the need for extra fittings and reduces potential leak points.
Practical tips for installation and best use:
- Ensure threads are clean and dry before assembly. Use appropriate thread sealant or PTFE tape rated for iron pipe to create a reliable seal.
- Hand-tighten first, then snug with a wrench to the manufacturer’s guidelines. Avoid over-tightening, which can damage threads.
- Verify system compatibility with a pressure test after installation, especially in hot water or pressurized lines.
For projects requiring a dependable, lead-free, malleable iron reducing coupling with two FIP ends, the STZ Industries 4 in. x 2-1/2 in. Black Malleable Iron Reducing Coupling delivers durable performance, straightforward installation, and a finish designed to withstand everyday use.
