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Malleable iron pipe coupling, threaded female ends, dark grey finish

Anvil

Anvil 0310081401 Malleable Iron Coupling Class 150 2-1/2 in FNPT

SKU CH-Y0EY-3Z0DQ MPN 0310081401

Malleable iron coupling connects 2-1/2 inch FNPT piping at up to 300 psi and 350 °F

  • TypeDrain Components
  • Malleable iron construction resists corrosion and mechanical stress
  • Class 150 rating supports 300 psi at 150 °F for reliable service
  • FNPT threads enable direct connection to standard NPT pipe
  • ASME B16.3 compliance confirms dimensional accuracy and pressure integrity
  • Temperature range from -20 °F to 350 °F suits steam and water systems

Anvil 2-1/2 in Class 150 Coupling

This Anvil coupling connects two sections of 2-1/2 inch pipe using female NPT threads. The malleable iron body meets ASME B 16.3 and carries UL and FM approvals for use in plumbing and fire-protection systems. It is rated for 300 psi at 150 degrees F and saturated steam at 150 psi at 350 degrees F. The operating temperature range spans -20 to 350 degrees F.

Installing the FNPT Coupling

Thread each pipe end into the female NPT ports using a compatible sealant or tape rated for the pressure and temperature limits. Malleable iron requires careful alignment to avoid cross-threading the 2-1/2 inch connection. Over-tightening can crack the fitting, so stop when the joint feels solid and leak-free. Verify the system pressure does not exceed 300 psi at 150 degrees F before putting the line into service.

Check Your Piping Before Ordering

Confirm the existing pipe has a 2-1/2 inch nominal size and male NPT threads that match the coupling's FNPT ports. Ensure the service conditions stay within the 300 psi and 350 degrees F limits listed for this Class 150 fitting. This coupling is not intended for applications requiring a different pressure class, connection type, or pipe diameter.

Highlights

  • Malleable iron construction resists corrosion and mechanical stress
  • Class 150 rating supports 300 psi at 150 °F for reliable service
  • FNPT threads enable direct connection to standard NPT pipe
  • ASME B16.3 compliance confirms dimensional accuracy and pressure integrity
  • Temperature range from -20 °F to 350 °F suits steam and water systems

Specifications

TypeDrain Components
BrandAnvil
Model0310081401

Questions about this item

How can I verify the coupling is seated correctly after threading it onto 2-1/2 in FNPT pipe?

Check that threads engage fully without cross-threading, then pressure-test the joint up to 300 psi at 150 °F or 150 psi saturated steam at 350 °F; no leakage confirms proper seating.

What components are included with the Anvil 0310081401 coupling, and are gaskets or sealant supplied separately?

The box contains only the malleable iron Class 150 coupling itself; thread sealant, gaskets, and any required pipe nipples must be purchased separately.

Which pressure-class version should I select for a system rated at 300 psi maximum working pressure?

The Class 150 coupling is rated for 300 psi at 150 °F and meets ASME B16.3, so it matches a 300 psi design requirement.

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