1-1/2 inch x 1 inch Black Iron Reducing Coupling Female x Female

1-1/2 inch x 1 inch Black Malleable Iron Reducing Coupling – Built for System Integrity

This 1-1/2 inch x 1 inch reducing coupling is manufactured from black malleable iron and designed for transitioning between different nominal pipe sizes in threaded systems. Suitable for use in gas, water, and oil lines, it supports applications requiring pressure-tight, corrosion-resistant joints in black iron piping systems.

The coupling features internal NPT threads on both ends and conforms to ASTM A197 for malleable iron castings. Its durable construction and consistent thread form make it a dependable choice for both new system installations and modification of existing lines where reduction in size is required.

Contractor-Focused Advantages

• ✅ Thread Integrity Precision-cut NPT threads ensure a tight mechanical seal under pressure.
• ✅ Consistent Taper Machined to maintain thread depth and pitch for compatibility with standard Schedule 40 steel pipe.
• ✅ High Temperature and Pressure Resistance Suitable for use in systems up to 300 PSI (non-shock) and operating temperatures up to 150°F depending on fluid media.
• ✅ Corrosion Resistance Black iron surface finish minimizes oxidation in dry gas and low-moisture environments.

Technical Details

• Nominal Size: 1-1/2 inch x 1 inch
• Material: Malleable cast iron, ASTM A197 compliant
• Connection: NPT threaded (female x female)
• Pressure Rating: 150 PSI steam, 300 PSI water/oil/gas (non-shock)
• Standards: ANSI B16.3 and ANSI B1.20.1 (threading)

Common Applications

This reducing coupling is widely used in gas distribution lines, hydronic heating systems, low-pressure steam, and compressed air installations. It's also effective in industrial utility piping where pipe size changes are required within confined runs or maintenance zones.

Specification Note

For optimal performance, apply a suitable thread sealant (PTFE tape or anaerobic compound) rated for the media type. Always verify compatibility with system pressure and code compliance requirements for the installation environment.