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Round malleable iron cap fitting with threaded female NPT connection

Anvil

Anvil 0318901360 Malleable Iron Cap Class 3000 Drain Trap

SKU CH-VPRF-T4Y9C MPN 0318901360

A malleable iron drain cap rated for 2,000 psi at 150 °F and 300 psi at 550 °F with a -20 °F to 550 °F operating range

  • Product typeDrain Components
  • Main materialHAWA
  • Malleable iron construction handles 2,000 psi at 150 °F
  • Class 3000 rating supports 300 psi steam at 550 °F
  • Female NPT threads fit 1 1/4 in pipe without extra fittings
  • Solid plug design seals drain lines from -20 °F to 550 °F
  • New Anvil cap installs straight from the box

Malleable Iron Drain Cap

The Anvil 0318901360 is a Class 3000 malleable iron cap designed for drain and trap assemblies. It serves plumbers and maintenance crews who need a solid plug for female NPT connections in industrial piping systems.

Upgrade from lower-class fittings

This cap replaces Class 150 or Class 300 components when the system operates at 2,000 psi at 150 degrees F or 300 psi steam at 550 degrees F. The jump is worth it when pressure or temperature exceeds the rating of standard drain fittings.

Pressure and temperature headroom

It comfortably handles continuous service from -20 degrees to 550 degrees F within the stated pressure limits. It runs out beyond 2,000 psi at 150 degrees F or above 300 psi steam pressure at the maximum temperature.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 67% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameAnvil
Model name0318901360
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

What size pipe thread does the 1 1/4 in NPT cap fit?

The cap uses a 1 1/4 inch Female NPT thread to match standard iron pipe of the same nominal size.

How do I install the malleable iron cap without stripping the threads?

Clean both thread sets, apply pipe sealant tape or compound to the male threads only, then hand-tighten before a final quarter-turn with a wrench.

When should I replace this Class 3000 drain cap?

Replace it if you see cracks, heavy corrosion, stripped threads, or any leakage at the joint during system pressure tests.

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