3/4 inch x 3-1/2 inch Galvanized Steel Nipple

3/4" x 3-1/2" Galvanized Steel Nipple – Threaded Connector for Utility and Mechanical Piping

The 3/4" x 3-1/2" galvanized steel nipple is a Schedule 40 straight pipe segment designed for use in threaded piping systems. Constructed from carbon steel and hot-dip galvanized in accordance with ASTM A153, this fitting provides corrosion resistance in mechanical, non-potable water, and low-pressure air systems. Threads are cut to NPT standards for compatibility with ANSI/ASME B1.20.1 pipe fittings.

Technical Specifications

• Nominal Size: 3/4 inch
• Length: 3-1/2 inches overall
• Material: Carbon steel pipe, galvanized
• Coating: Hot-dip galvanized (ASTM A153)
• Wall Thickness: Schedule 40
• Thread Type: NPT male threads (ANSI/ASME B1.20.1)
• Manufacturing Standards: Pipe per ASTM A53; nipple per ASTM A733

Installation Notes

Before installation, ensure threads are clean and apply a compatible thread sealant or PTFE tape. Tighten with a pipe wrench appropriate for 3/4" pipe to achieve a sealed connection. Avoid over-torquing to preserve thread integrity. Suitable for above-ground or exposed systems where corrosion resistance is beneficial. Not rated for potable water use unless listed accordingly.

Common Applications

This galvanized steel nipple is used in:

• Water distribution (non-potable)
• Air compressor and mechanical utility lines
• Fire protection and sprinkler systems (if listed)
• Threaded system terminations or extensions

Material Considerations

Galvanized steel provides moderate corrosion resistance in atmospheric conditions but is not suitable for high-chloride or aggressive environments. For buried systems or areas with high humidity, additional coating or alternative materials such as stainless steel or coated pipe may be required.