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Malleable iron trap coupling, half-inch FNPT threads, dark grey finish

Anvil

Anvil 0310538400 Trap Coupling 1/2" FNPT Malleable Iron Class 300

SKU CH-5J02-39YWF MPN 0310538400

Malleable iron Class 300 trap coupling with 1/2 inch FNPT threads rated for Schedule 80 pipe at 2,000 psi and 150 degrees Fahrenheit

  • Product typeDrain Components
  • Malleable iron construction resists corrosion in harsh environments
  • Class 300 rating handles 2,000 psi at 150 °F
  • 1/2 in FNPT threads connect Schedule 80 pipe securely
  • Straight coupling design simplifies drain-line assembly
  • Anvil brand trusted for durable plumbing components

Product Identity

The Anvil 0310538400 is a 1/2 inch FNPT malleable iron trap coupling rated for Class 300 service. It connects two female-threaded pipes in drainage and trap assemblies where straight alignment is required.

Suitable Applications

This coupling suits plumbers and maintenance teams joining Schedule 80 piping at 1/2 inch nominal size with a 2,000 psi pressure rating at 150 degrees Fahrenheit. It is not for systems needing a reducing connection, a different thread standard, or a lower pressure class.

Installation Notes

The straight, female-threaded ends accept standard NPT pipe threads for direct assembly with thread sealant. Malleable iron requires careful tightening to avoid cracking; over-torquing is the most common installation error.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 76% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameAnvil
Model name0310538400
Product typeDrain Components

Questions about this item

What size Schedule 80 pipe is required for the 1/2 in FNPT threads on this Class 300 malleable iron coupling?

The coupling is designed for 1/2 in Schedule 80 pipe, matching its 1/2 in female threaded ends.

Will the 2,000 psi rating at 150 Degrees F hold when connecting to existing lower-class fittings in the same line?

The coupling is rated for 2,000 psi at 150 Degrees F; the overall system pressure is limited by the lowest-rated component in that line.

How can I confirm the coupling is sealed correctly after threading it onto the pipe?

Pressurise the system up to its design limit and check the 1/2 in FNPT joints for leaks; no leakage indicates a proper seal.

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