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Cast iron tee fitting with threaded connections

Anvil

Anvil 0300031200 Cast Iron Tee Class 125 Trap

SKU CH-BMT7-2781G MPN 0300031200

Cast iron tee fitting rated Class 125 for 175 psi water pressure and 125 psi steam up to 150 °F

  • TypeDrain Components
  • Cast iron construction resists corrosion for long service life
  • Class 125 rating handles up to 175 psi at 150 °F
  • ASME B16.4 compliance ensures dimensional accuracy and safety
  • FNPT threads allow direct connection to standard pipe
  • UL and FM approvals confirm fire-protection suitability

Cast Iron Tee for Drain Systems

The Anvil 0300031200 is a cast iron tee fitting designed for plumbing drain and trap assemblies. It carries a Class 125 rating and meets ASME B16.4 standards with UL and FM approvals. The fitting uses a 1/4 inch FNPT connection and suits residential or commercial drainage installations. It is supplied new and ready for standard pipe work.

Upgrading from Worn or Lower-Rated Fittings

This tee replaces damaged, corroded or unrated cast iron fittings in existing drain lines. The jump is worth it when the system requires a verified 175 psi pressure rating at temperatures up to 150 degrees F and a saturated steam rating of 125 psi. It also satisfies code requirements that call for ASME B16.4 compliance and third-party certification.

Check Connection Type and System Limits

Before ordering, confirm that the 1/4 inch FNPT thread matches the pipe threads in your assembly. Verify that the operating pressure and temperature stay within the rated range of -20 to 150 degrees F and 175 psi maximum. Ensure the surrounding piping material is compatible with cast iron and that local codes accept the listed standards.

Highlights

  • Cast iron construction resists corrosion for long service life
  • Class 125 rating handles up to 175 psi at 150 °F
  • ASME B16.4 compliance ensures dimensional accuracy and safety
  • FNPT threads allow direct connection to standard pipe
  • UL and FM approvals confirm fire-protection suitability

Specifications

TypeDrain Components
BrandAnvil
Model0300031200

Questions about this item

What pipe size and thread type does the 1/4 in FNPT tee require for installation?

The tee uses a 1/4 inch pipe size with FNPT (Female National Pipe Thread) connections on all three ports.

How do you correctly seal the FNPT threads on this Class 125 cast iron tee?

Apply PTFE tape or pipe thread sealant to the male threads only, then tighten to the recommended torque without over-tightening the cast iron.

When should this tee be inspected or replaced based on its pressure and temperature ratings?

Inspect if system pressure exceeds 175 psi or temperature goes outside the -20 to 150 °F range; replace if cracks, corrosion or thread damage appear.

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