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Malleable iron pipe cap with female NPT threads

Value Brand

Value Brand 1-1/2" FNPT Malleable Iron Class 300 Cap

SKU CH-650Z-XWXTT

Seals a 1-1/2 inch FNPT pipe end with Class 300 malleable iron rated from -20 to 550 degrees F

  • Rated for 300 psi service pressure
  • Operates from -20 to 550 degrees F
  • Malleable iron resists cracking under stress
  • 1-1/2 inch FNPT threads fit standard pipe
  • Prop 65 warning for California buyers

Pressure Class 300 Cap

This malleable-iron cap carries a Class 300 pressure rating and a 1-1/2 inch FNPT thread. It is built for piping systems that operate up to 550 degrees F and down to -20 degrees F. The fitting contains no pre-applied thread sealant and no integrated seal.

Installers needing Class 300 strength

The part suits plumbers and maintenance crews who must close a 1-1/2 inch female NPT line at Class 300 service pressure. It will not meet the needs of systems that require a higher pressure class or a different thread standard.

Class 300 rating

The single specification that decides fit is the Class 300 pressure designation combined with the 1-1/2 inch FNPT thread. Only systems specifying this exact class and thread should use this cap.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 73% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What thread size matches the 1-1/2" FNPT opening on this malleable iron cap?

The cap has a 1-1/2 inch FNPT thread that fits a matching male NPT pipe end.

Which sealing method is required when installing this Class 300 threaded cap?

Apply PTFE tape or pipe thread sealant to the male threads before tightening the cap onto the pipe.

How often should the cap be inspected when used near the 550 Degrees F temperature limit?

Inspect the threads and body for cracks or leakage at each scheduled system shutdown or at least once per year.

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