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Anvil malleable iron hex bushing trap, 4 by 3-1/2 inch NPT, cast iron class 125

Anvil

Anvil 0318908761 4" x 3-1/2" Malleable Iron Hex Bushing Trap

SKU CH-MPYN-BMA70 MPN 0318908761

A cast-iron hex bushing connects 4-inch male NPT to 3-1/2-inch female NPT pipe at 175 psi and 150 °F

  • TypeDrain Components
  • MaterialHAWA
  • Malleable iron construction resists corrosion for long service life
  • Class 125 rating supports 175 psi at 150 degrees F
  • Schedule 40 compatibility fits standard piping systems
  • NPT threads on both ends ensure secure, leak-free connections
  • Reduces 4 inch male to 3-1/2 inch female for versatile installations

Product Identity

The Anvil 0318908761 is a malleable iron hex bushing designed to connect a 4 inch male NPT pipe to a 3 1/2 inch female NPT pipe. It is rated for Class 125 service and Schedule 40 piping systems. The fitting handles a maximum operating pressure of 175 psi at 150 degrees Fahrenheit. It serves plumbers and maintenance crews working on standard drain and trap assemblies.

Suitability

This bushing suits installers who need a straight-threaded reduction between the two stated NPT sizes in a Class 125 iron system. It is not for applications that require a different thread standard, a higher pressure class, or a non-iron material. Buyers who want a fitting with a different male or female diameter should look at another size.

Build Integration

The component threads directly into existing Schedule 40 piping without special tools beyond standard pipe wrenches. Its hex profile allows secure tightening in confined spaces where a round fitting would be difficult to grip. The iron construction matches the thermal expansion of surrounding iron pipework, reducing stress on joints during temperature changes.

Highlights

  • Malleable iron construction resists corrosion for long service life
  • Class 125 rating supports 175 psi at 150 degrees F
  • Schedule 40 compatibility fits standard piping systems
  • NPT threads on both ends ensure secure, leak-free connections
  • Reduces 4 inch male to 3-1/2 inch female for versatile installations

Specifications

TypeDrain Components
MaterialHAWA
BrandAnvil
Model0318908761

Questions about this item

Does the 4 in male NPT end require a Schedule 40 pipe to thread into?

Yes, the bushing is rated for Pipe Schedule 40 and has a 4 in male NPT thread for that connection.

Will the Class 125 rating handle the same pressure as my existing Class 125 fittings?

The fitting is Class 125 and rated for 175 psi at 150 °F, matching other Class 125 components at that temperature.

How can I confirm the joint is sound after assembly?

Pressurise the system up to 175 psi at 150 °F and check the male and female NPT threads for leaks.

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