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Square head pipe plug, malleable iron, 1-1/2 inch MNPT

Value Brand

Value Brand 5P547 Square Head Plug 1-1/2" MNPT

SKU CH-4C6J-QEEYN

1-1/2" MNPT square-head plug in malleable iron, Class 150 rated from -20 to 366°F

  • 1-1/2 inch MNPT thread fits standard piping systems
  • Malleable iron construction withstands 150 psi service pressure
  • Operates reliably from -20 to 366 degrees Fahrenheit
  • Cored plug design reduces weight while maintaining strength
  • Square head allows secure installation with standard wrenches

Square Head Plug 1-1/2" MNPT

This malleable iron pipe plug fits a 1-1/2 inch nominal pipe size with male NPT threads. It is rated for Class 150 service and suits general plumbing and industrial piping installations where a threaded closure is required. The square head allows tightening with a standard wrench for a secure seal.

Temperature range -20 to 366 degrees F

The fitting operates continuously from -20 to 366 degrees F, giving wide headroom for hot water, steam or chilled lines within that window. It runs out beyond the upper limit where material strength drops or in cryogenic service below -20 degrees F. No pre-applied thread sealant is included so joint compound or tape must be supplied by the installer.

Malleable iron construction with square head

The cored malleable iron body provides mechanical strength for Class 150 pressure ratings while the square head offers positive wrench engagement during assembly and removal. California Proposition 65 warnings apply because the product contains chemicals known to cause cancer and reproductive harm. The plug ships new without a seal or pre-applied sealant.

Highlights

  • 1-1/2 inch MNPT thread fits standard piping systems
  • Malleable iron construction withstands 150 psi service pressure
  • Operates reliably from -20 to 366 degrees Fahrenheit
  • Cored plug design reduces weight while maintaining strength
  • Square head allows secure installation with standard wrenches

Specifications

BrandZORO SELECT

Questions about this item

Will the 150 class iron plug hold up when I thread it into my existing galvanised nipples?

The plug is made of malleable iron rated to Class 150 so it matches standard galvanised fittings and handles the same pressure range.

How can I confirm the 1-1/2 inch MNPT threads sealed properly after installation?

Pressurise the system and check for leaks; the threads are cut to MNPT standards and the operating range spans -20 to 366 degrees F.

Does the 5P547 plug come with any sealant or gasket in the package?

The supplier notes specify that no pre-applied thread sealant and no seal are included, so you will need to supply your own pipe compound or tape.

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