STZ Industries 2-1/2 in MIP Galvanized Malleable Iron Plug is built to reliably seal 2-1/2" National Pipe Taper (NPT) connections in demanding plumbing and utility systems. Crafted from tough malleable iron and finished with a galvanized coating, this plug delivers dependable closure in wet, humid, and outdoor environments while resisting corrosion for longer service life.
Why this plug stands out
Size and compatibility: 2-1/2" MIP (Male Iron Pipe) threads that conform to standard NPT sizing, ensuring a snug, leak-resistant fit on compatible piping. This is a practical choice for closing off unused branches, performing system tests, or temporarily halting flow during maintenance.
Durable construction: Malleable iron provides a robust, impact-tolerant core with reliable threads, while the galvanized finish adds corrosion resistance in damp environments, irrigation setups, or outdoor installs.
Safety and compliance: The plug is described with lead-free construction, supporting safer handling in applications involving potable water or indoor plumbing where lead exposure is a concern.
Key specifications at a glance
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Material: Malleable iron
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Finish: Galvanized
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End 1: 2-1/2" MIP (Male Iron Pipe)
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Maximum pressure: 300 psi
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Maximum temperature: 150°F
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Packaging: Bagged
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Lead content: Lead-free
Ideal use cases
This plug is well-suited for:
- Sealing off sections of residential or commercial piping during maintenance or after repairs
- Temporary or permanent closure of unused branch lines in plumbing, HVAC, or irrigation systems
- Pressure testing and system commissioning where a reliable, leak-tight plug is required
- Outdoor or service-access installations where a durable, corrosion-resistant closure is beneficial
Practical installation tips
To ensure a solid seal and long service life:
- Clean and inspect the male threads before installation.
- Apply appropriate thread sealant or PTFE tape compatible with the system fluids and temperatures.
- Hand-tighten first, then snug with the correct wrench. Avoid overtightening to prevent thread damage.
- After installation, perform a pressure test or leak check as part of your standard commissioning procedure.
Why choose STZ Industries
STZ Industries brings practical engineering and reliability to everyday plumbing tasks. This 2-1/2" MIP galvanized malleable iron plug combines sturdy material with corrosion resistance, designed to stand up to real-world use. The lead-free construction adds peace of mind for potable-water-related applications, while the bagged packaging makes it easy to stock and deploy on job sites. If you’re a professional plumber, contractor, or facility manager, this plug is a straightforward, durable solution for closing off pipe runs quickly and confidently.
