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

1-1/4” x 4” Galvanized Steel Nipple – Threaded for Durable Mechanical Connections

The 1-1/4” x 4” Galvanized Steel Nipple is designed for joining two female-threaded fittings in a range of mechanical and plumbing systems. Fabricated from schedule 40 welded steel pipe and hot-dip galvanized for enhanced corrosion resistance, this nipple supports long-term integrity in water distribution, air handling, and low-pressure steam lines.

Application Standards and Construction Details

• ✅ Thread Type: ANSI B1.20.1 NPT tapered threads on both ends ensure secure mechanical seals and code compliance.
• ✅ Material: Welded carbon steel with continuous hot-dip zinc galvanizing, suitable for indoor and outdoor use in corrosive or humid conditions.
• ✅ Pipe Grade: Meets ASTM A53/A and A733 standards for pipe nipple fabrication.
• ✅ Finish: Galvanized coating thickness complies with ASTM A123, enhancing resistance to oxidation and galvanic reaction with dissimilar metals.

Use Case Considerations

Typical use environments include water service lines, hydronic systems, and compressed air piping in both commercial and residential buildings. Not intended for potable water systems unless otherwise rated lead-free and approved to NSF/ANSI standards.

Installation Guidance

Install using appropriate pipe threading compound or PTFE tape to ensure a leak-resistant connection. Apply torque with pipe wrenches only at the hex or unthreaded body—avoid over-tightening at threads to prevent cracking or deformation. Always verify compatibility with the system's temperature and pressure ratings before installation.

Specifications Summary

• Nominal Size: 1-1/4 inch
• Length: 4 inches overall
• Connection Type: Male NPT x Male NPT
• Material: Galvanized steel
• Standard Compliance: ASTM A53, ASTM A733, ANSI B1.20.1

Technical Note

Galvanized nipples should not be used in closed-loop hydronic heating systems where high alkalinity or dissimilar metal corrosion is a concern. When installed in mixed-metal systems, proper dielectric unions or fittings should be used to mitigate galvanic corrosion.

For pressure-rated mechanical connections requiring dependable service life, the 1-1/4” x 4” galvanized steel nipple delivers robust performance aligned with professional-grade installation practices.