Meet the STZ Industries 4 in. MIP x 3 in. FIP Galvanized Malleable Iron Hex Bushing — a rugged reducer built for reliability in demanding plumbing and irrigation runs. This hex-style bushing smoothly transitions from a 4" male pipe thread to a 3" female pipe thread, all wrapped in a galvanized finish that stands up to the elements.
What makes this bushing stand out
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Size and configuration: 4" MIP to 3" FIP with a hex body for easy wrench access in tight spaces.
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Material and finish: forged malleable iron paired with a galvanizing coating to resist corrosion in outdoor, buried, or damp environments.
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Pressure and temperature ratings: rated up to 300 psi and capable of handling up to 150°F, making it suitable for water service and many irrigation or light industrial applications.
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Lead-free construction: designed with safety and compliance in mind, so you can use it with confidence in potable-water systems.
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Packaging: thoughtfully bagged to protect threads and keep components organized on the job.
Ideal applications and use cases
This hex bushing is perfect for projects where you need to downsize from a 4" MIP line to a 3" FIP connection without replacing larger sections of piping. Common scenarios include:
- Connecting a 4" main line to a 3" valve, filter, or other 3" components in water or irrigation systems.
- Retrofit work where a full pipe run must be reconfigured to fit 3" fittings while preserving the integrity of the 4" segment.
- Outdoor or exposed installations where corrosion resistance and robust mechanical strength are important.
Installation tips and considerations
- Clean threads thoroughly before assembly to ensure a solid seal.
- Use a compatible pipe thread sealant or PTFE tape rated for metal threads to minimize leaks.
- Apply steady, even tightening with a wrench on the hex flats to avoid stressing the fitting.
Why choose STZ Industries
STZ Industries brings durability and practical design to every connection. The combination of malleable iron’s toughness, the galvanic finish for corrosion resistance, and the precise MIP-to-FIP threading delivers a dependable, long-lasting solution for your piping upgrades and repairs. If you’re outfitting a toolbox for plumbing, irrigation, or light industrial work, this 4 in. MIP x 3 in. FIP hex bushing is a smart, concrete investment that reduces downtime and helps you complete projects with confidence.
