1 inch x 3/4 inch Galvanized Iron Reducing Tee Female x Female x Female

1" x 3/4" Galvanized Iron Reducing Tee – Threaded Fitting for Pipe Size Transitions

The 1" x 3/4" Galvanized Iron Reducing Tee is a three-outlet pipe fitting designed to connect two 1" lines and one 3/4" branch in a T-shaped configuration. Manufactured from cast malleable iron and hot-dip galvanized for corrosion resistance, it is suitable for use in low- to medium-pressure piping systems for water, gas, air, and oil distribution.

This tee provides a mechanical solution for reducing branch line diameter while maintaining a rigid connection across the header. It conforms to ANSI/ASME B16.3 dimensional standards and is threaded in accordance with ASME B1.20.1 National Pipe Taper (NPT) specifications.

Key Product Features

• ✅ Material: Hot-dip galvanized malleable iron (ASTM A197 base metal with ASTM A153 zinc coating)
• ✅ Configuration: 1" NPT x 1" NPT x 3/4" NPT – all outlets internally threaded (FPT)
• ✅ Pressure Rating: Suitable for non-shock working pressures up to 150 PSI (liquid) or 300 PSI (air/gas)
• ✅ Corrosion Protection: Zinc coating inhibits rust formation in aboveground and dry piping installations
• ✅ Standards Compliance: ANSI/ASME B16.3 and ASTM A153

Installation Guidelines

Threaded galvanized fittings must be installed using a compatible thread sealant or PTFE tape to ensure a leak-free joint. Care should be taken not to overtighten, as this may cause cracking in the fitting or distortion of mating threads. Fittings should be properly aligned and supported to maintain system integrity during thermal expansion and contraction cycles.

Common Applications

This reducing tee is commonly used in residential and light commercial plumbing systems for connecting branch lines of different diameters. Applications include water distribution, compressed air systems, and low-pressure steam lines where galvanized fittings are acceptable under code.

Additional Notes

Galvanized fittings are intended for non-potable systems unless specifically certified for drinking water. Their corrosion resistance makes them a practical choice in environments where moisture or atmospheric humidity is a concern, particularly in basements, crawl spaces, and exposed utility runs.

Technical Summary

• Nominal Sizes: Run: 1" NPT / Branch: 3/4" NPT
• Fitting Type: Reducing Tee
• Material: Galvanized Malleable Iron
• End Connections: Female NPT x Female NPT x Female NPT
• Certifications: Compliant with ASME B16.3, ASTM A153 (coating), ASTM A197 (iron casting)