1-1/2 inch x 1-1/4 inch Copper DWV Reducing Coupling Fitting x Copper

1-1/2 inch x 1-1/4 inch Copper DWV Reducing Coupling – For Code-Compliant Pipe Transitions

The 1-1/2 inch x 1-1/4 inch Copper DWV Reducing Coupling is designed for use in gravity drainage, waste, and vent systems. This fitting enables a smooth transition between different nominal copper pipe sizes and supports consistent system flow while maintaining code compliance in residential and commercial applications.

Fabricated from lead-free wrought copper, this coupling is engineered for soldered joints. Its dimensional accuracy and uniform wall thickness ensure strong and reliable connections when installed with approved flux and lead-free solder. Ideal for use in horizontal or vertical DWV lines, the coupling contributes to a clean, low-maintenance assembly.

Key Features

• ✅ Lead-Free Copper: Manufactured to ASTM B75/B88 standards and compliant with NSF/ANSI 61 for safe, code-compliant installations.
• ✅ Sweat Connection: Designed for soldered joints using standard plumbing tools and approved materials.
• ✅ Size Transition: Connects 1-1/2 inch and 1-1/4 inch nominal copper tubing in DWV systems.
• ✅ ASME B16.29 Compliant: Meets dimensional and performance standards for copper DWV fittings.
• ✅ Corrosion Resistant: Copper's natural resistance to corrosion supports long-term performance in typical drain and vent conditions.

Installation Guidelines

Ensure both pipe ends are properly cleaned, reamed, and free of debris. Apply flux to both the male and female surfaces before heating and soldering. Maintain proper pitch in horizontal runs and allow sufficient access for inspection. Always follow local plumbing codes and safety practices during installation.

Product Specifications

• Material: C12200 lead-free wrought copper
• Nominal Size: 1-1/2 inch x 1-1/4 inch
• Connection Type: Female solder socket x female solder socket
• Fitting Type: Reducing coupling for DWV systems
• Standards: ASME B16.29, ASTM B75, NSF/ANSI 61

Applications

Used in non-pressurized copper DWV piping systems, this reducing coupling is commonly found in horizontal drain branches, vent stack transitions, and retrofits involving diameter changes. It is suitable for residential and light commercial installations requiring safe, soldered joints in compliance with modern building codes.

Did You Know?

All copper DWV fittings used for drainage in the United States must now be lead-free under the federal Safe Drinking Water Act. This change ensures both safety and long-term durability in modern plumbing systems.

The 1-1/2 inch x 1-1/4 inch Copper DWV Reducing Coupling delivers a reliable, code-compliant solution for reducing transitions in gravity flow drainage lines. Built for longevity, precision, and ease of installation, it remains a standard component in professional-grade copper DWV systems.