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Black iron hex bushing with threaded NPT ends

Anvil

Anvil 0318908969 Hex Bushing 4 x 1-1/4 In NPT Black Iron Trap

SKU CH-CT0K-MRWF3 MPN 0318908969

A 4 by 1-1/4 inch NPT black iron hex bushing rated 300 psi WOG at 150 degrees F for low-pressure plumbing

  • TypeDrain Components
  • Reduces pipe size from 4 in to 1-1/4 in with NPT threads
  • Withstands 300 psi water-oil-gas pressure at 150 °F
  • Meets ASME B16.3 standard for malleable iron fittings
  • UL listed and FM approved for safety compliance
  • Certified for potable water use in California and Vermont

Plumbing Reducer for Multi-Service Lines

The Anvil 0318908969 hex bushing reduces a 4-inch NPT opening to a 1-1/4-inch NPT connection. It is designed for low-pressure plumbing carrying air, water, natural gas, or steam. The black iron construction suits residential, commercial, and industrial piping systems requiring a durable transition fitting.

Class 150 Black Iron with NPT Threads

Cast from black malleable iron, the fitting meets ASME B16.3 dimensions and is UL listed and FM approved. The NPT threads create a tapered seal compatible with black cast-iron or steel pipe. Certified for potable water use in California and Vermont, it installs with standard pipe wrenches on the external hex flats.

Rated 300 PSI WOG at 150 Deg F

The bushing handles a maximum of 300 psi water, oil, or gas at 150 degrees Fahrenheit and 150 psi saturated steam. Class 150 construction provides a safety margin for normal pressure fluctuations. The robust iron body resists mechanical damage and thermal cycling in everyday service without deformation or leakage.

Highlights

  • Reduces pipe size from 4 in to 1-1/4 in with NPT threads
  • Withstands 300 psi water-oil-gas pressure at 150 °F
  • Meets ASME B16.3 standard for malleable iron fittings
  • UL listed and FM approved for safety compliance
  • Certified for potable water use in California and Vermont

Specifications

TypeDrain Components
BrandAnvil
Model0318908969

Questions about this item

What does the NPT thread standard mean for sealing this 4 x 1-1/4 inch hex bushing?

NPT threads create a tapered seal that tightens as you turn; wrap the male threads with PTFE tape or pipe dope before threading into the female port to prevent leaks on water, gas or steam lines.

Which wrench size fits the hexagonal flats on this black iron bushing?

A standard 4-inch pipe wrench or large adjustable wrench engages the hex flats; ensure the jaws grip fully across the flats to avoid rounding the iron when applying torque.

How do you install this Class 150 bushing without cracking the iron?

Hand-tighten until the threads engage, then turn one to two full turns with a wrench; stop when resistance rises sharply — over-tightening splits the malleable iron.

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