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Malleable iron square head pipe plug, dark metal finish, threaded end visible

Value Brand

Value Brand 2WU86 Malleable Iron Square Head Plug Class 150

SKU CH-3YE1-3GGBE

A 2-1/2 inch malleable iron square head plug rated Class 150 for 300 psi at 150°F and 150 psi saturated steam, meeting ASME B16.3, B16.4, ASTM A197 and A47 with FM and UL approval

  • Malleable iron construction withstands 300 psi pressure
  • Class 150 rating handles saturated steam at 150 psi
  • Operates reliably from -20 to 366 degrees F
  • ASME B 16.3 and B 16.4 compliant for quality assurance
  • FM Approved and UL Listed for safety verification

ZORO SELECT 2-1/2 Inch MNPT Plug

This malleable iron square head plug fits 2-1/2 inch male NPT threads and carries Class 150 pressure ratings. It meets ASME B 16.3, B 16.4, ASTM A-197 and ASTM A47 standards with FM and UL listings. The cored construction reduces weight while maintaining structural integrity for plumbing and industrial piping systems. Suitable for installers who need a listed fitting for code-compliant assemblies.

Suits installers needing a rated NPT plug

Builders who require a different pipe size, female threads or a higher pressure class should select another fitting. Systems that operate beyond 300 psi at 150 °F or above 150 psi saturated steam pressure exceed this plug's rated limits. Applications needing non-iron materials or specialised coatings are not addressed by this model.

Class 150 rating with 300 psi at 150 °F maximum

This single specification defines the plug's safe operating envelope for water, oil, air and saturated steam up to 150 psi. The temperature range spans -20 °F to 366 °F, covering typical heating and process piping conditions. Verifying the system design pressure against this rating confirms whether the plug is the correct component.

Highlights

  • Malleable iron construction withstands 300 psi pressure
  • Class 150 rating handles saturated steam at 150 psi
  • Operates reliably from -20 to 366 degrees F
  • ASME B 16.3 and B 16.4 compliant for quality assurance
  • FM Approved and UL Listed for safety verification

Specifications

BrandZORO SELECT

Questions about this item

Will the 2-1/2 in MNPT threads on this Class 150 plug match the existing galvanised nipples I already have installed?

Yes, the male NPT threads follow ASME B16.3 and B16.4 dimensions, so they will engage standard 2-1/2 in female NPT fittings you are keeping.

How can I confirm the plug is sealed correctly after I thread it into the pipe?

Pressurise the system up to 300 psi at 150 °F or 150 psi saturated steam; no leakage at the joint means the cored square head is sealing as intended.

Does the box include thread sealant or a wrench for the square head, or must I buy those separately?

Only the malleable iron plug is supplied; pipe thread sealant and a suitably sized square-head wrench are not included and must be purchased separately.

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