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Anvil hex bushing three inch by one inch malleable iron threaded fitting

Anvil

Anvil 0318908407 Hex Bushing 3" x 1" FNPT x MNPT Malleable

SKU CH-P6P2-XBEDA MPN 0318908407

Connects 3-inch male pipe to 1-inch female pipe with 175 psi rating at 150 degrees F

  • Product typeDrain Components
  • Main materialHAWA
  • Connects 3 in pipe to 1 in pipe via FNPT x MNPT threads
  • Malleable iron construction rated for 175 psi at 150 °F
  • Class 125 Schedule 40 straight cast iron drain component
  • New condition ensures clean threads and full pressure integrity
  • Ready for residential or commercial drainage installations

Anvil 3" x 1" Hex Bushing

The Anvil 0318908407 is a malleable iron hex bushing designed to connect a 3-inch male NPT thread to a 1-inch female NPT thread. It is rated for Class 125 service and Schedule 40 pipe, making it suitable for standard plumbing and drainage installations. The fitting handles a maximum operating pressure of 175 psi at 150 degrees Fahrenheit.

Plumbers reducing pipe diameter

This bushing suits installers who need a straight, threaded reduction between two specific nominal pipe sizes in a cast iron system. It is not intended for applications requiring a different pressure class, a larger temperature range, or a connection type other than FNPT by MNPT. Buyers needing a coupling, an adapter, or a different size combination should select another fitting.

Sustained pressure and temperature performance

Under continuous operation at the rated 175 psi and 150 degrees Fahrenheit, the malleable iron body maintains its structural integrity without deformation. The cast iron construction resists the thermal cycling common in drainage and low-pressure steam lines. The hex profile allows secure installation torque without rounding, ensuring the joint remains tight over long service periods.

How it compares

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

Price $22.99
Cheaper than about 60% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameAnvil
Model name0318908407
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

What pipe schedule must the existing piping be for this Class 125 malleable bushing to seal properly?

The bushing is rated for Schedule 40 pipe, so the connecting 3-inch male and 1-inch female threads must both be cut to that schedule for a leak-free joint.

Will the 175 psi rating at 150 °F hold if I thread this into older galvanised steel fittings?

Yes, the 175 psi maximum operating pressure at 150 °F applies to the bushing itself; ensure the mating galvanised threads are clean, undamaged and also rated for that pressure and temperature.

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

Pressurise the system up to its working limit — no higher than 175 psi — and check the 3-inch male and 1-inch female joints for any sign of leakage.

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