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Malleable iron reducing coupling, Class 300, 1 1/4 in to 3/4 in female NPT

Anvil

Anvil 0310543400 reducing coupling trap

SKU CH-FVRE-6KXRK MPN 0310543400

Malleable iron reducing coupling rated Class 300 for Schedule 80 pipe with 500 psi maximum operating pressure at 150°F

  • TypeDrain Components
  • MaterialHAWA
  • Malleable iron construction resists corrosion in demanding plumbing systems
  • Class 300 rating handles 500 psi at 150 degrees Fahrenheit
  • Schedule 80 compatibility suits high-pressure pipe installations
  • Reducing coupling joins 1 1/4 inch and 3/4 inch female NPT threads
  • Female NPT threads on both ends enable direct threaded connections

Product Identity

The Anvil 0310543400 is a malleable iron reducing coupling designed for plumbing professionals and industrial maintenance teams who need to join pipes of different diameters in high-pressure systems. It provides a direct transition between 1 1/4 inch and 3/4 inch female NPT threads.

Decisive Specification

Rated at Class 300 for Schedule 80 piping, this coupling withstands a maximum operating pressure of 500 psi at 150 degrees Fahrenheit. Installers must verify that the system design pressure and temperature stay within this limit before specifying the fitting.

Sustained Load Behaviour

Malleable iron construction resists deformation when the joint remains under continuous high pressure and thermal cycling at 150 degrees Fahrenheit. The material maintains sealing integrity over long duty cycles without the creep that can affect lower-class fittings under similar conditions.

Highlights

  • Malleable iron construction resists corrosion in demanding plumbing systems
  • Class 300 rating handles 500 psi at 150 degrees Fahrenheit
  • Schedule 80 compatibility suits high-pressure pipe installations
  • Reducing coupling joins 1 1/4 inch and 3/4 inch female NPT threads
  • Female NPT threads on both ends enable direct threaded connections

Specifications

TypeDrain Components
MaterialHAWA
BrandAnvil
Model0310543400

Questions about this item

What does the 500 psi rating mean once the coupling is installed?

The 500 psi rating is the maximum operating pressure at 150 degrees Fahrenheit, so the joint will hold that pressure in service without leaking.

What does the Class 300 NPT thread standard cap in practice?

Class 300 malleable iron with NPT threads is rated for 500 psi at 150 degrees Fahrenheit, limiting the joint to that pressure and temperature range.

What pipe sizes and thread type does this reducing coupling need to fit?

It connects a 1 1/4 inch female NPT pipe to a 3/4 inch female NPT pipe, both on Schedule 80 piping.

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