The STZ Industries 2-1/2 in. MIP x 2-1/2 in. MIP Black Steel 8 in. Nipple is a durable, lead-free solution for robust steel piping runs. With MIP (male iron pipe) ends on both sides, this 8-inch nipple provides reliable threaded connections that stand up to demanding applications in plumbing, heating, and industrial systems.
Key specifications at a glance
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End 1: Diameter 2-1/2 in, Type MIP
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End 2: Diameter 2-1/2 in, Type MIP
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Length: 8 in
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Material: Steel
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Finish: Black steel
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Maximum Pressure: 230 psi
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Maximum Temperature: 400°F
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Lead Content: Lead-Free
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Packaging: Bagged
Why this nipple is a smart choice
Unlike generic fittings, this nipple is purpose-built for long-lasting, dependable performance in steel piping systems. The two MIP ends ensure a secure, threaded connection with standard NPT fittings, while the 8-inch length offers flexibility to bridge gaps or create clean, accessible runs in tight spaces. The lead-free construction supports modern plumbing standards, making it a trustworthy option for a wide range of potable and non-potable uses.
Ideal uses and scenarios
- Connecting two sections of 2-1/2 in nominal steel pipe in residential, commercial, and industrial projects
- Extending piping runs in heating, ventilation, and air conditioning (HVAC) installations
- Repair or retrofit work where a longer, threaded steel nipple is required
- Outdoor installations where a durable black steel finish offers a rugged, long-lasting look (when used with appropriate coatings and protection)
Installation tips for a secure seal
- Clean threads before installation to remove debris and ensure a proper seal
- Apply a compatible thread sealant or PTFE tape rated for steel/NPT threads
- Tighten with the appropriate wrench to achieve a snug fit without over-torquing, which can damage threads
- After assembly, check for leaks and retighten as necessary, allowing the system to reach operating pressure gradually
What to consider when choosing
This nipple is suited for projects requiring robust steel connections with MIP ends and a definitive length. Its 230 psi maximum pressure and 400°F maximum temperature make it versatile for many piping tasks, while the lead-free composition adds peace of mind for installations near potable water lines. If your project calls for a durable, long-reaching, two‑end threaded steel connector, this STZ Industries nipple is engineered to perform reliably under real-world conditions.
