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Malleable iron hex bushing with black finish

Anvil

Anvil 0318908522 Malleable Iron Hex Bushing Class 150 300 psi 350 Degrees F

SKU CH-DFK0-FZD6K MPN 0318908522

Malleable iron hex bushing rated Class 150 for 300 psi at 150 °F and 150 psi saturated steam at 350 °F, meeting ASME B 16.3

  • TypeDrain Components
  • MaterialHAWA
  • Malleable iron construction withstands 300 psi at 150 °F
  • Class 150 rating meets ASME B16.3 standard for reliable piping connections
  • Hex design allows secure installation with standard wrenches
  • FNPT x MNPT threads connect 3 1/2 in to 3 in pipe sizes
  • Temperature range from -20 °F to 350 °F suits steam and water systems

Malleable Iron Hex Bushing

This Anvil 0318908522 is a Class 150 pipe fitting made from malleable iron. It connects a 3 1/2 inch FNPT port to a 3 inch MNPT port in plumbing systems. The component is rated for 300 psi at 150 degrees F and 150 psi saturated steam at 350 degrees F. It meets ASME B16.3 and UL FM standards.

Suitable Applications

This bushing suits installers reducing pipe size in steam, water, gas or oil lines within the rated pressure and temperature range. It is not for systems exceeding 300 psi or 350 degrees F. It is not for potable water lines requiring lead-free certification. It is not for builders needing a different reduction ratio or connection type.

Critical Specification

The defining specification is the 3 1/2 inch FNPT by 3 inch MNPT reduction with Class 150 pressure rating. This exact size and thread combination determines whether the fitting matches the existing piping. Verify both diameters and thread standards before purchase.

Highlights

  • Malleable iron construction withstands 300 psi at 150 °F
  • Class 150 rating meets ASME B16.3 standard for reliable piping connections
  • Hex design allows secure installation with standard wrenches
  • FNPT x MNPT threads connect 3 1/2 in to 3 in pipe sizes
  • Temperature range from -20 °F to 350 °F suits steam and water systems

Specifications

TypeDrain Components
MaterialHAWA
BrandAnvil
Model0318908522

Questions about this item

What thread size must the existing pipe have to accept the 3-1/2 in x 3 in FNPT x MNPT hex bushing?

The bushing connects a 3-1/2 inch female NPT thread to a 3 inch male NPT thread, so the mating pipe must provide the matching 3 inch male NPT end.

Will the Class 150 malleable iron bushing hold up on a legacy steam line rated for 150 psi at 350 °F?

Yes, the fitting is rated for saturated steam at 150 psi and 350 °F, matching the legacy line’s design conditions.

How can I confirm the bushing is seated correctly after installation?

Tighten until the hex faces are fully engaged and no threads are visible; then pressurise the system to the operating pressure and check for leaks at the joint.

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