The Anderson Metals 3/8 in. FPT Red BrAss Cap is a durable, lead-free solution designed to securely seal unused 3/8 inch female pipe thread lines. Crafted from red brass, this cap combines reliable sealing with added visibility, making hot-water and hydronic projects easier to manage and safer over time.
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Material: Red brass for excellent corrosion resistance and long-lasting performance
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End 1 Type: 3/8 in. FPT (female pipe thread) — accepts standard 3/8 in. male threads for a snug, leak-free connection
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Product Type: Cap — specifically designed to seal off piping ends
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Lead Content: Lead-free for safer potable water applications
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Maximum Pressure: 200 psi — suitable for a wide range of residential and light commercial systems
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Maximum Temperature: 150°F — appropriate for typical hot water and heating system environments
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Color/Finish: Red finish for quick identification and color-coding in complex piping setups
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Package Quantity: 1 cap per package
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ANSI Certified: No
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Brand: Anderson Metals
Why choose this cap? If you’re assembling a plumbing, heating, or hydronic system, this cap provides a reliable, code-conscious way to terminate a line that won’t be in use. The lead-free composition meets safety expectations for potable water systems, while the red brass material delivers durable performance under temperature and pressure conditions common in residential applications.
Ideal use cases:
- Sealing off a 3/8" FPT branch or service line during installation or maintenance
- Winterizing hot-water and hydronic heating loops without risk of leaks
- Temporary closure of unused service ports in copper or brass piping networks
Practical tips: Pair this cap with standard 3/8" male threads for a clean, dependable seal. Regularly inspect threaded connections for proper torque to maintain a tight fit, especially in systems with thermal cycling. The color coding helps distinguish hot-water lines from others at a glance, reducing installation errors in multi-line projects.
