B&K Schedule 40 3/4 in. MIP x 1/2 in. MIP Polyethylene 1-1/2 in. Close Nipple is a compact, durable plumbing fitting designed for quick, reliable size transitions in pressure piping. This 1-1/2 inch long close nipple connects a 3/4 inch MIP male thread to a 1/2 inch MIP male thread, making it ideal for tight spaces where a direct size change is needed without additional fittings.
Key features that matter in real-world installs
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End connections: 3/4 in. MIP to 1/2 in. MIP (male iron pipe threads) for straightforward integration with standard piping components.
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Material and type: Polyethylene construction with Schedule 40 profile delivers a robust, corrosion-resistant path for pressure applications.
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Length: 1-1/2 inches, enabling compact transitions in confined spaces such as utility rooms, basements, or crawl spaces.
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Pressure and temperature: Rated for up to 345 psi and temperatures up to 140°F, making it suitable for typical potable water and low- to mid-temperature applications.
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Certifications: ANSI-certified, with NSF-listed quality assurance for safe, code-compliant installations.
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Package details: Sold as a single close nipple, ready for immediate use in your project.
Why this polyethylene close nipple stands out
Compared to metal alternatives, this B&K polyethylene close nipple offers practical advantages for modern plumbing and irrigation systems: lighter weight for easier handling, excellent corrosion resistance, and compatibility with standard MIP-threaded components. Its Schedule 40 profile ensures predictable flow characteristics and alignment with other schedule-40 fittings, reducing the need for additional adaptors.
Ideal applications and use cases
- Connecting a 3/4" water supply line to a 1/2" branch in residential or commercial piping runs where space is limited.
- Transitioning between different pipe sizes in pressure-rated systems such as outdoor filtration lines, cold-water distribution, or irrigation manifolds.
- Repairs or upgrades where a compact, readily available MIP-to-MIP adapter reduces the footprint of the installation.
Practical installation tips
- Use a thread sealant rated for plastic/PVC piping on male threads; avoid over-tightening to prevent thread damage.
- Ensure clean, dry threads before assembly for a reliable seal and to minimize leaks.
- Verify that system pressure and temperature stay within the 345 psi and 140°F ratings to maintain long-term performance.
- Consult applicable local codes or a licensed plumber if you're uncertain about compatibility with potable water or specific fluids.
Specifications at a glance
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Brand: B&K
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Material: Polyethylene
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Schedule: 40
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End 1: 3/4 in. MIP
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End 2: 1/2 in. MIP
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Length: 1-1/2 in.
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Maximum Pressure: 345 psi
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Maximum Temperature: 140°F
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NSF Listed: Yes
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ANSI Certified: Yes
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Number in Package: 1
For projects requiring a reliable, compact size transition within pressure piping, the B&K Schedule 40 3/4 in. MIP x 1/2 in. MIP Polyethylene 1-1/2 in. Close Nipple delivers predictable performance, easy handling, and code-compliant safety.
