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White Lasco Schedule 40 PVC 3-inch threaded plug (MPT) shown at angle, highlighting hex drive and molded male NPT threads.

Lasco 3" Schedule 40 PVC Threaded Plug (MPT) 450-030

Brand: PVC
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$10.40
$7.80
SKU 450030

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Built to industry standards, the Lasco 3" Schedule 40 PVC threaded plug (MPT) provides a reliable, corrosion-resistant closure for 3-inch threaded pipe runs. Designed for irrigation, pool and drainage systems, this molded PVC plug delivers precision-molded threads and a hex drive for quick installation and removal. Manufactured for consistent dimensional accuracy, it offers a compact footprint and strong wall construction suitable for standard Schedule 40 piping applications.

  • Material: Schedule 40 PVC in white - lightweight, chemical- and corrosion-resistant for typical water handling systems.
  • Size & Threads: 3" nominal pipe size with male NPT (MPT) threads; standard 3"-8 thread profile and hex drive for wrench installation.
  • Certifications: Made to ASTM specifications and commonly supplied with NSF certifications for potable water (NSF-14, NSF-61) where indicated.
  • Performance: Suitable for cold-water and irrigation service; typical maximum service temperature around 140°F and system-dependent pressure ratings (Schedule 40).
  • Applications & Limits: Ideal for irrigation, pool plumbing, drainage and temporary line closures. Not for compressed air or gases; follow local codes for hot-water or pressure-critical systems.
  • Installation: Thread into a matching 3" female NPT; hand-start threads, apply PTFE tape or compatible thread sealant, then tighten using the hex drive.

Choose this Lasco 450-030 plug when you need a straightforward, durable closure for 3" threaded fittings. Consult system specifications and local plumbing codes for compatibility and temperature/pressure limits. For potable-water installations, confirm NSF compliance on packaged product or supplier documentation.

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Frequently Asked Questions

What size and thread does this plug use?
3-inch nominal size with male NPT (MPT) threads; standard 3"-8 thread profile.
How should I install the 450-030 threaded plug?
Hand-start into a matching 3" female NPT, apply PTFE tape or compatible sealant, then tighten with a wrench on the hex drive.
Can this plug be used in potable water and pool systems?
Yes—commonly supplied with NSF certifications (NSF-14/61) for potable water; verify certification on supplied packaging.