Meet the STZ Industries 2-1/2 in FIP x 2 in FIP Galvanized Malleable Iron Reducing Coupling—the rugged, reliable connector you need when transitioning from a larger pipe to a smaller line in water distribution, irrigation, or heating systems. With a 2-1/2 inch FIP on one end and a 2 inch FIP on the other, this reducing coupling delivers a precise, leak‑tight fit where space and flow matter most.
Engineered from durable malleable iron and finished in galvanization, this fitting is designed to resist corrosion in moist environments and stand up to the daily demands of residential and light commercial plumbing. The galvanized surface adds an extra layer of protection, helping extend the life of your piping network even in exposed or outdoor installations.
Key specifications
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End 1 diameter and type: 2-1/2" FIP
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End 2 diameter and type: 2" FIP
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Material: Malleable iron
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Finish: Galvanized
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Maximum pressure: 300 psi
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Maximum temperature: 150°F
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Lead content: Lead-free (average)
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Packaging: Bagged
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Product type: Reducing coupling
What problems does it solve?
- Enables a clean size change in water lines without a full rework—ideal when adapting to older or oversized pipe runs.
- Offers a robust, long-lasting connection for potable water applications where reliability matters most.
- Galvanized finish provides enhanced protection against corrosion in damp, indoor, or outdoor plumbing environments.
Ideal use cases
- Replacing or tying into existing galvanized or malleable iron piping in residential homes and small commercial projects.
- Creating a transition from 2-1/2" pipe runs to standard 2" lines in supply lines, branch lines, or heating circuits.
- Repair work on aging plumbing where a dependable, threaded, metal-to-metal joint is preferred over plastic alternatives.
Why this fits your project
Choosing a galvanized malleable iron reducing coupling like this STZ fitting provides a balance of strength, durability, and ease of installation. The FIP (Female Iron Pipe) threads ensure compatibility with standard male pipe threads, while the 300 psi/150°F ratings cover typical household water and light commercial scenarios. It’s an excellent choice when you need a dependable, rugged connection that resists the wear and corrosion common in wet environments.
Practical installation tips
- Prepare threads with a clean, dry surface; use PTFE tape or appropriate pipe thread sealant on each threaded end for a watertight seal.
- Hand-tighten, then snug with a wrench for a secure fit—avoid overtightening to prevent thread damage.
- Support piping to minimize movement and stress at the joint, especially in outdoor or high-traffic areas.
- Verify alignment before applying pressure; slowly pressurize the line and check for leaks after a short test.
Whether you’re a professional plumber or a meticulous homeowner tackling repairs, the STZ Industries 2-1/2 in FIP x 2 in FIP Galvanized Malleable Iron Reducing Coupling is built to deliver a dependable, long‑lasting connection that keeps your water system flowing smoothly.
