1-1/4 inch Copper DWV Adapter Copper x Male

1-1/4 inch Copper DWV Adapter – Transition Fitting for Drain, Waste, and Vent Systems

The 1-1/4 inch Copper DWV Adapter is a copper fitting designed for use in non-pressurized drain, waste, and vent (DWV) piping systems. It provides a transition between copper DWV tubing and other system components using a solder joint connection. Manufactured from wrought copper, this adapter conforms to ASME B16.29 and ASTM B75 (Alloy C12200) standards, ensuring dimensional accuracy and compatibility with code-compliant DWV systems.

It features a female solder cup for copper tube insertion and a male or female threaded or hub end (depending on the configuration) for interfacing with system cleanouts, fittings, or traps. DWV adapters are essential in gravity drainage systems where a reliable mechanical transition is required without the use of pressurized seals.

Product Features

• ✅ Material: Wrought copper (C12200, DHP) for excellent corrosion resistance and workability
• ✅ Standard Compliance: ASME B16.29 and ASTM B75; NSF/ANSI 61 and 372 for lead-free applications
• ✅ Connection Type: Solder cup x DWV hub or thread (variant dependent)
• ✅ Size: 1-1/4 inch nominal
• ✅ Application: Gravity-flow DWV systems—non-pressurized only

Installation Guidelines

Install using standard copper joining procedures for DWV systems. Clean and ream tubing ends before inserting into the fitting socket. Apply soldering flux and use a lead-free solder suitable for non-pressurized systems. Ensure system is not exposed to internal pressure—this fitting is not rated for use in water supply or pressurized lines. Refer to IPC or UPC code sections governing joint spacing and support.

Common Applications

Typically used in residential and commercial building drain lines, branch waste arms, and fixture drain transitions. Often installed in remodels or retrofits where DWV-grade copper piping is used in combination with other materials or termination types.

Regulatory Information

This fitting meets lead-free requirements under the Safe Drinking Water Act and is listed for DWV use in accordance with national plumbing codes. Not for use in hot or cold potable water supply systems or pressurized mechanical piping.