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Galvanized malleable iron union coupling with FNPT threads

Anvil

Anvil 313822140 1-1/4" FNPT Galvanized Union coupling

SKU CH-CAPG-TYJPV

Connects 1-1/4 inch FNPT pipes with galvanized malleable iron rated to 300 psi at 150 degrees F and 150 psi steam at 350 degrees F

  • Galvanized malleable iron resists corrosion
  • Class 150 rating handles 300 psi water, oil, gas at 150 °F
  • Saturated steam service to 150 psi at 350 °F
  • FM Approved and UL Listed for code compliance
  • FNPT threads install quickly with standard pipe tools

Anvil 1-1/4" FNPT Galvanized Union

The Anvil 313822140 is a Class 150 galvanized malleable iron union with female NPT threads. It joins two pipes in water, oil or gas lines where occasional disassembly is required. The fitting meets ASTM A197, ASME B16.36 and carries FM and UL listings.

Installation and common issues

Thread the union onto clean male NPT ends using pipe sealant or tape rated for 300 psi WOG. Tighten the central nut evenly to seat the gasket without over-stressing the iron. Leaks usually come from damaged threads, missing sealant or an uneven nut.

Compatibility checklist

Confirm the mating pipes are 1-1/4" male NPT and the system pressure stays within 300 psi at 150 °F WOG or 150 psi saturated steam at 350 °F. Verify the fluid temperature range falls between -20 °F and 350 °F. Check local codes for galvanized iron acceptance.

Highlights

  • Galvanized malleable iron resists corrosion
  • Class 150 rating handles 300 psi water, oil, gas at 150 °F
  • Saturated steam service to 150 psi at 350 °F
  • FM Approved and UL Listed for code compliance
  • FNPT threads install quickly with standard pipe tools

Specifications

BrandANVIL

Questions about this item

How can I confirm the union is sealed and rated for the 300 psi WOG limit after installation?

Pressurize the system to the design pressure and check the FNPT joint for leaks; the galvanized malleable iron body meets ASTM A197 and ASME B 16.36, and carries FM and UL listings for 300 psi at 150 °F WOG.

What comes with the Anvil 313822140 union and what must be sourced separately?

The box contains the Class 150 galvanized union with 1-1/4" FNPT threads; pipe nipples, thread sealant or tape, and any required hangers or supports are not included.

Which version of this union should I choose for saturated steam service at 150 psi and 350 °F?

This single listed model is rated for 150 psi saturated steam at 350 °F and covers the full -20 °F to 350 °F range, so no alternate version is needed for those conditions.

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