1-1/4 inch x 1/2 inch Black Iron Bushing

1-1/4 Inch x 1/2 Inch Black Malleable Iron Reducing Bushing – Threaded

The 1-1/4 inch x 1/2 inch black malleable iron reducing bushing is engineered to join two different nominal pipe sizes within threaded piping systems. This fitting is ideal for gas, air, oil, or non-potable water applications where a strong, pressure-rated connection is required.

Technical Overview

This reducing bushing features male National Pipe Thread (NPT) on the 1-1/4 inch end and female NPT on the 1/2 inch end. Manufactured from ASTM A197 malleable iron, the bushing conforms to ASME B16.3 standards for dimensional accuracy and mechanical performance.

Key Performance Features

• Material: Black malleable iron, uncoated finish for indoor use or gas piping applications
• Size: 1-1/4 inch male NPT x 1/2 inch female NPT
• Connection Type: Tapered threads per ANSI B1.20.1
• Pressure Rating: 150 psi for steam; 300 psi for water, oil, and gas (WOG)
• Temperature Range: Suitable for service temperatures up to 650°F

Installation Considerations

Apply pipe joint compound or PTFE tape to the male threads before installation. Always tighten the fitting using the hex drive section—avoid over-tightening, which can distort threads or damage mating components. Not intended for use with potable water unless treated or coated for corrosion resistance.

Applications

• Gas piping systems (natural or LP)
• Low-pressure steam distribution
• Air compressor lines and industrial piping
• Oil distribution or mechanical process lines

Compliance and Durability

Conforms to applicable ASTM and ASME standards for mechanical properties and dimensional tolerances. Black iron bushings are valued for their strength under torque and pressure, and their compatibility with steel piping in closed systems not exposed to corrosive environments.

Note:

For applications requiring corrosion protection or potable water use, a galvanized or epoxy-coated version should be specified.