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Round malleable iron pipe cap with threaded interior

Value Brand

Value Brand Malleable Iron Cap Class 150 5P531

SKU CH-HW40-3Y356

Malleable iron cap with female NPT threads rated for Class 150 service from -20 to 366 °F

  • Class 150 pressure rating handles demanding plumbing systems
  • Malleable iron construction resists cracking under mechanical stress
  • Female NPT threads create secure leak-resistant connections
  • Operates from -20 to 366 degrees F for versatile installations
  • Prop 65 listed chemical present for regulatory awareness

Malleable Iron Cap Class 150

This malleable iron pipe cap carries a Class 150 pressure rating and a 1/8 inch nominal pipe size. It is designed for plumbing installations that require a reliable threaded closure. The female NPT threads accept standard male pipe ends. It suits professionals and DIYers sealing off pipe terminations.

Female NPT Threaded Fitting

The cap threads directly onto male NPT pipe ends without additional sealant or gaskets included in the package. Its malleable iron construction provides mechanical strength for threaded connections. Installers must supply compatible pipe and thread compound separately. The fitting frees the system from open ports during pressure testing or permanent closure.

Temperature Range -20 to 366 Degrees F

The cap operates continuously from -20 to 366 degrees Fahrenheit, covering typical hot and cold water services. Class 150 rating defines its pressure headroom for standard residential and light commercial lines. It is not intended for high-pressure steam or cryogenic systems beyond the stated limits. California Proposition 65 warnings apply to chemical content.

Highlights

  • Class 150 pressure rating handles demanding plumbing systems
  • Malleable iron construction resists cracking under mechanical stress
  • Female NPT threads create secure leak-resistant connections
  • Operates from -20 to 366 degrees F for versatile installations
  • Prop 65 listed chemical present for regulatory awareness

Specifications

BrandZORO SELECT

Questions about this item

How does the Class 150 rating limit sustained pressure use?

The Class 150 rating sets the maximum working pressure for continuous service, so the cap will hold seal integrity up to that limit without deformation.

What heat exposure can this malleable iron cap tolerate during all-day operation?

It is rated from -20 Degrees to 366 Degrees F, so it withstands typical hot-water and steam lines without softening or leaking.

Which thread type must the mating pipe or fitting already have for this cap to seal?

The cap uses Female NPT threads, so the connecting pipe or fitting must provide matching Male NPT threads for a proper seal.

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