1-1/2 inch x 1-1/4 inch Copper Reducing Adapter Copper x Female

1-1/2 inch x 1-1/4 inch Copper Reducing Adapter – DWV Transition Fitting

The 1-1/2 inch x 1-1/4 inch Copper Reducing Adapter is designed for use in drainage, waste, and vent (DWV) systems where a reduction in nominal pipe size is required. This copper fitting allows for a smooth, soldered transition between 1-1/2 inch and 1-1/4 inch type DWV copper tubing, ensuring effective alignment and system flow control within horizontal and vertical runs.

Manufactured from wrought copper (C12200), the adapter is fabricated to meet ANSI/ASME B16.29 dimensional standards and is compliant with NSF/ANSI 61 and NSF 372 certifications for lead-free plumbing applications. The reducer's uniform wall thickness and clean cup fittings ensure consistent heat transfer during soldering and long-term corrosion resistance in DWV installations.

Key Product Features

• ✅ Wrought Copper Construction (C12200) – Provides high corrosion resistance and dimensional stability under thermal expansion
• ✅ Solder Joint Connection – Cup x Cup design for standard soldering with type DWV copper tube
• ✅ Precision Formed Ends – Enables uniform capillary action during joint assembly
• ✅ Lead-Free Compliance – Fully conforms to U.S. Safe Drinking Water Act (SDWA) requirements
• ✅ Meets Industry Standards – Built to ANSI/ASME B16.29, ASTM B75 and B88 specifications

Technical Specifications

• Material: Wrought Copper (Alloy C12200)
• Connection Type: Cup x Cup, Solder Joint
• Size: 1-1/2 inch x 1-1/4 inch
• Compliance: NSF/ANSI 61 & 372, ANSI B16.29
• Application: DWV (Drainage, Waste, Vent Systems)

Application Areas

This fitting is typically installed in copper DWV systems requiring a reduction in pipe diameter between fixture drains and vertical stacks. Common applications include residential bathroom branch lines, vent transitions, and horizontal waste pipe offsets in slab or wall assemblies.

Installation Guidelines

Install using approved soldering techniques and fluxes in accordance with IPC/UPC and local code. Pipe ends must be cleaned and reamed to ensure proper solder fill. Pressure testing should follow project-specific requirements for system integrity verification.

Industry Note

DWV copper fittings must be clearly differentiated from pressure-rated fittings. This reducer is for non-pressurized waste and vent systems only. It is not intended for potable water pressure lines or hydronic loops.

The 1-1/2 inch x 1-1/4 inch Copper Reducing Adapter delivers precision, durability, and compliance required in modern DWV system design. Trusted by trade professionals for its reliability in the field.