1-3/8 inch x 1-1/4 inch Copper Reducing Adapter Copper x Female

1-1/4” Copper Reducing Adapter – Sweat Connection for DWV and Potable Water Systems

The 1-1/4” Copper Reducing Adapter is a reliable transition fitting designed for joining copper tube of different diameters in both supply and drainage systems. Manufactured from lead-free wrought copper, this adapter offers a secure connection between 1-1/4” and a smaller copper pipe size, using solder (sweat) joints on both ends.

Compliant with ASTM B75 and ANSI/ASME B16.22 standards, this fitting is intended for soldered copper systems that convey potable water, hydronic heating fluid, or DWV drainage. The adapter's tapered design allows for reduced pipe sizing while maintaining system performance and flow characteristics within industry-accepted friction loss tolerances.

Product Specifications

• Material: Wrought Copper (lead-free, per NSF 61-G & NSF 372)
• End Connections: Sweat (C x C)
• Primary Size: 1-1/4” nominal
• Secondary Size: As required (e.g., 1” or 3/4” outlet)
• Standards: ASME B16.22, ASTM B75, NSF/ANSI 61, NSF 372 (lead-free)

Advantages for Professional Installations

• ✅ Reliable Reduction – Allows smooth transition between pipe sizes without using multiple fittings.
• ✅ Code-Compliant Material – Lead-free copper meets current U.S. potable water system regulations.
• ✅ Thermal Resilience – Suitable for systems operating under elevated temperatures and pressures.
• ✅ Corrosion Resistance – Maintains structural integrity even in aggressive water conditions.
• ✅ Compact Profile – Efficient solution for confined mechanical spaces and retrofits.

Application Areas

This reducing adapter is commonly used in:

• • Domestic hot and cold water supply systems
• • Copper-based hydronic heating systems
• • Drainage-waste-vent (DWV) piping networks
• • Commercial and institutional copper plumbing retrofits

Installation Considerations

Install using standard soldering methods after cleaning the pipe ends and applying flux. Ensure proper pipe insertion depth and apply heat evenly for consistent solder flow. Not intended for use in systems subject to continuous vibration or extreme pressure cycles without expansion controls in place.

Note:

This fitting should only be used with copper tubing conforming to ASTM B88 types K, L, or M. For potable water installations, ensure local code compliance regarding lead-free certification.

The 1-1/4” Copper Reducing Adapter offers dependable sizing transitions while maintaining system efficiency and long-term integrity. Designed for compatibility with soldered copper systems in accordance with U.S. building codes, it’s a durable solution for any contractor requiring compact, high-performance copper transitions.