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A 2 inch malleable iron threaded pipe cap in dark metal finish

Value Brand

Value Brand 2" FNPT Malleable Iron Cap Class 300

SKU CH-807R-52SPD

Threaded malleable iron cap seals 2-inch pipe connections up to 550 °F and Class 300 pressure rating

  • Rated for high-pressure systems up to 300 class
  • Malleable iron construction resists cracking under mechanical stress
  • Operates reliably from -20 to 550 degrees F
  • Female NPT threads enable direct connection to 2 inch pipe
  • California Proposition 65 warning for cancer and reproductive harm

2-inch Malleable Iron Cap

This 2-inch malleable iron pipe cap provides a permanent or temporary threaded closure for Class 300 piping systems. It suits maintenance crews and installers who need a durable seal on a 2-inch FNPT connection. The fitting is rated for service temperatures ranging from -20 to 550 degrees Fahrenheit. It arrives new and ready for immediate use on compatible pipework.

Class 300 Pressure Rating

The Class 300 designation is the single specification that determines whether this cap matches the pressure requirements of the system. It defines the maximum allowable working pressure at a given temperature for malleable iron fittings. Selecting a lower class risks leakage or failure under load, while a higher class adds unnecessary cost and weight. Verify the system design pressure against this rating before ordering.

Threaded Installation Notes

The cap installs by threading onto a male NPT pipe end using standard pipe wrenches. No pre-applied thread sealant is included, so installers must supply appropriate tape or compound to ensure a leak-free joint. Over-tightening can crack the malleable iron, while insufficient engagement leaves a leak path. California Proposition 65 warnings apply due to chemicals known to cause cancer and reproductive harm.

Highlights

  • Rated for high-pressure systems up to 300 class
  • Malleable iron construction resists cracking under mechanical stress
  • Operates reliably from -20 to 550 degrees F
  • Female NPT threads enable direct connection to 2 inch pipe
  • California Proposition 65 warning for cancer and reproductive harm

Specifications

BrandZORO SELECT

Questions about this item

What does the Class 300 rating mean once the cap is installed on a 2" pipe?

Class 300 designates the pressure class for the threaded connection, indicating its suitability for higher-pressure service compared to lower-class fittings.

How does the FNPT threading standard affect what this cap can seal?

The Female National Pipe Taper threads create a tapered seal when mated with a matching 2" male NPT pipe or fitting, relying on thread interference and sealant for a leak-tight joint.

What physical clearance and tools are needed to fit this malleable iron cap?

A 2" nominal pipe size requires a large pipe wrench or strap wrench for installation; the malleable iron body is heavy and brittle, so adequate swing space and proper thread engagement are essential to avoid cracking.

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