The STZ Industries 4 in. FIP x 4 in. FIP Galvanized Malleable Iron Union is built for reliability in potable water and light industrial piping. This two-ended union uses sturdy malleable iron with a durable galvanized finish, delivering a serviceable, removable connection that simplifies maintenance without sacrificing strength.
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Two 4 in. FIP ends: Each side features a female iron pipe thread that threads onto standard 4" fittings, providing a secure, disassemblable connection for easy maintenance and future upgrades.
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Lead-free construction: Designed with safety in mind for potable water applications, giving you confidence in the material’s suitability for everyday use.
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Corrosion-resistant finish: Galvanized exterior shields the union from moisture and rust, making it a solid choice for basements, crawl spaces, and outdoor installs.
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High-strength performance: Rated up to 300 psi and temperatures up to 150°F, balancing toughness with practicality for typical water supply and light industrial piping needs.
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Removable, maintenance-friendly design: Unlike permanent joins, this union can be taken apart quickly for repairs, replacements, or system upgrades with minimal downtime.
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Practical packaging: Bagged for organized storage on job sites and efficient inventory management.
Who benefits most: plumbers, facilities maintenance teams, and contractors tackling 4" piping projects where future access matters. Use cases include potable water lines, irrigation manifolds, and light industrial circuits where you need a secure, reversible connection without welding or soldering.
Installation notes (practical tips): align threads carefully, use an appropriate thread sealant compatible with potable water, and tighten evenly with two wrenches to avoid cross-threading. Avoid over-tightening to preserve the integrity of the FIP connections. Regularly inspect for signs of wear or corrosion and replace the union if leaks appear.
Choose the STZ Industries 4 in. FIP x 4 in. FIP Galvanized Malleable Iron Union for a durable, serviceable solution that makes 4" piping runs easier to assemble, disassemble, and maintain—without compromising on safety or performance.
