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3 inch malleable iron pipe cap with threaded FNPT connection

Value Brand

Value Brand 3" FNPT Malleable Iron Cap Class 150

SKU CH-M928-3NGF8

Malleable iron cap with 3-inch FNPT threads rated for Class 150 service from -20 to 366 degrees F

  • 3" FNPT thread fits standard 3-inch pipe
  • Malleable iron construction rated Class 150 pressure
  • Operating range from -20 °F to 366 °F
  • No pre-applied sealant allows custom joint prep
  • California Proposition 65 chemical warning applies

3-Inch Malleable Iron Cap

This 3-inch malleable iron cap provides a Class 150 threaded closure for piping systems. It accepts FNPT threads and carries the Zoro Select brand. The fitting is supplied new and is intended for general plumbing installations that require a durable cap.

Threaded Installation Without Sealant

The cap installs by threading onto a matching male pipe end. No pre-applied thread sealant is included, so the installer must supply a compatible sealant or tape. Ensure the threads are clean and properly engaged to prevent leaks during pressure testing.

Temperature Range and Pressure Class

The cap is rated for continuous service from -20 degrees to 366 degrees Fahrenheit at its Class 150 pressure rating. This range supports hot-water and steam lines within the stated limits. The malleable iron construction maintains integrity under sustained thermal cycling.

Highlights

  • 3" FNPT thread fits standard 3-inch pipe
  • Malleable iron construction rated Class 150 pressure
  • Operating range from -20 °F to 366 °F
  • No pre-applied sealant allows custom joint prep
  • California Proposition 65 chemical warning applies

Specifications

BrandZORO SELECT

Questions about this item

How can I confirm the 3" FNPT malleable iron cap is sealing correctly after installation?

Pressurise the system up to the Class 150 rating and inspect the threaded joint for leaks; the cap contains no pre-applied sealant, so thread tape or paste must be used.

What comes in the box and what must be purchased separately?

The package includes only the 3" malleable iron cap; thread sealant or tape is not supplied and must be bought separately.

Which version should I choose for a 3" nominal pipe size rated to 150 psi?

Select the ZORO SELECT 2WU80 cap, which matches 3" FNPT, Class 150, malleable iron construction and a -20 °F to 366 °F temperature range.

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