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

1-1/2" x 3-1/2" Galvanized Steel Pipe Nipple – Schedule 40, NPT Threaded

The 1-1/2" x 3-1/2" galvanized steel nipple is a Schedule 40 fitting used to connect two female-threaded components in mechanical, water distribution, or low-pressure gas systems. Manufactured from welded or seamless steel pipe in accordance with ASTM A53 specifications, this nipple is hot-dip galvanized for corrosion resistance in wet or exposed environments.

It features National Pipe Tapered (NPT) threads per ANSI B1.20.1 on both ends and is cut to a nominal overall length of 3-1/2 inches, making it suitable for joining sections of piping where precise spacing and dimensional integrity are required. This component is commonly used in both residential and commercial plumbing assemblies where steel piping is specified.

Product Specifications

• ✅ Nominal Size: 1-1/2"
• ✅ Length: 3-1/2" overall (close to short length range)
• ✅ Material: Galvanized steel – ASTM A53, Schedule 40
• ✅ Thread Type: NPT male x NPT male (ANSI B1.20.1)
• ✅ Finish: Hot-dip galvanized per ASTM A123 for improved corrosion protection

Performance and Use Considerations

• ✅ Pressure Rating: Suitable for working pressures as defined by Schedule 40 pipe ratings, dependent on fluid type and temperature
• ✅ Application Scope: Water supply lines, air systems, non-potable drainage, and general-purpose piping
• ✅ Environmental Suitability: Galvanized finish resists external corrosion from moisture, condensation, or soil contact
• ✅ Installation Method: Use with compatible thread sealant or PTFE tape to ensure a leak-resistant joint

Typical Applications

This pipe nipple is used in mechanical rooms, service risers, pump connections, equipment manifolds, and other areas where pipe-to-pipe connectivity is required in galvanized steel systems. It is appropriate for use with valves, fittings, and devices requiring threaded connections in residential, commercial, and light industrial installations.

Material Insight

Galvanized steel fittings are specified when additional corrosion resistance is required without the use of non-metallic materials. They are widely accepted in systems not handling potable water unless specifically rated as such under local code amendments. Mechanical threading offers a strong, disassemblable connection suitable for structural and service applications.