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Hexagonal malleable iron pipe coupling with female threaded ends

Anvil

Anvil 310538004 Pipe Coupling 1/4" FNPT Malleable Iron Class 300

SKU CH-Z62M-VPWND

Malleable iron Class 300 coupling joins two 1/4" FNPT threads for Schedule 80 pipe at 2,000 psi and 150°F

  • Malleable iron construction resists cracking under stress
  • Class 300 rating handles 2,000 psi at 150 °F
  • Female NPT threads seal directly to Schedule 80 pipe
  • Straight coupling design joins two pipes in line
  • Anvil brand trusted in professional plumbing systems

Anvil 1/4" FNPT Malleable Iron Coupling

This Anvil coupling joins two sections of 1/4 inch pipe using female National Pipe Thread connections. It is rated for Schedule 80 piping systems and carries a Class 300 pressure rating. The fitting suits plumbing, hydraulic and industrial fluid-handling installations that require a straight, threaded joint.

Class 300 Malleable Iron Build

Cast from malleable iron, the coupling withstands 2,000 psi at 150 degrees Fahrenheit. The material resists cracking under vibration and thermal cycling better than standard grey iron. Female threads on both ends accept male-threaded pipe or nipples without adapters, simplifying assembly and disassembly for maintenance.

Upgrade from Class 150 or Lower-Rated Fittings

Installers moving from Class 150 components gain a higher pressure margin for Schedule 80 service. The jump is worth it when system pressure approaches the lower class limit or when code requires Class 300. It does not suit applications needing larger diameters, different thread types or pressure ratings beyond 2,000 psi.

Highlights

  • Malleable iron construction resists cracking under stress
  • Class 300 rating handles 2,000 psi at 150 °F
  • Female NPT threads seal directly to Schedule 80 pipe
  • Straight coupling design joins two pipes in line
  • Anvil brand trusted in professional plumbing systems

Specifications

BrandANVIL

Questions about this item

What pressure does the Class 300 FNPT rating allow at 150 degrees F?

The coupling is rated for 2,000 psi at 150 degrees F, which is the maximum operating pressure for the Class 300 malleable iron fitting.

What pipe schedule must be used with this 1/4 inch coupling?

This fitting is designed for Schedule 80 pipe, so the male threads must match that wall thickness to seal correctly.

How many wrench turns past hand-tight are needed for a 1/4 inch NPT joint?

After hand-tight engagement, turn one to two full turns with a wrench; stopping at hand-tight leaves a leak path.

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