1/2 inch x 3/8 inch Copper Reducing Coupling Fitting X Copper

1/2 inch x 3/8 inch Copper Reducing Coupling – DWV Pattern for Precise Transitions

The 1/2 inch x 3/8 inch copper reducing coupling is engineered to connect copper tubing of dissimilar diameters in drainage, waste, and vent (DWV) applications. Manufactured from high-grade copper, this fitting ensures a uniform, corrosion-resistant structure for long-term reliability in non-pressurized systems.

Designed to conform with ASTM B75 and B306 standards, the coupling provides a slip fit on both ends for soldered connections. Its seamless design and precise dimensions make it ideal for maintaining flow continuity while reducing line size within DWV configurations.

Product Features

• ✅ Seamless Copper Construction – Drawn from a single piece of copper to prevent split or crack failures.
• ✅ Consistent Wall Thickness – Supports even heat distribution during soldering and ensures structural uniformity.
• ✅ Reduced End Sizing – Precisely formed to allow secure connection between 1/2 inch and 3/8 inch copper tubing.
• ✅ Suitable for Soldered Joints – Compatible with ASTM B813 lead-free solder and approved fluxes.
• ✅ Code-Compliant – Meets UPC, IPC, and NSF standards for use in residential and commercial drain systems.

Technical Specifications

• Material: C12200 Copper (DWV Grade)
• Size: 1/2 inch x 3/8 inch nominal tubing
• Connection Type: Cup x Cup (Slip)
• Application: DWV transitions (non-pressurized systems only)
• Standards: ASTM B306, NSF/ANSI 61 & 372 (lead-free)

Installation Notes

Install using standard soldering techniques. Prepare pipe ends by cleaning and deburring; apply flux to both mating surfaces. Use a properly sized torch for uniform heating. Ensure the joint cools undisturbed before handling. Not intended for pressurized potable water systems.

Typical Applications

This reducing coupling is commonly used in residential and light commercial DWV systems to adapt between branch drains and smaller fixtures. Ideal for lavatory, bar sink, or condensate drain runs requiring a reduction in pipe diameter while maintaining copper-to-copper continuity.

Note:

DWV copper fittings should not be substituted in pressure water supply lines. For potable systems, use pressure-rated wrought copper couplings meeting ASTM B88 specifications.

Choose the 1/2 inch x 3/8 inch copper reducing coupling when precision and code-compliant performance are required in copper DWV installations. Built to professional standards, this fitting provides long-lasting service in critical drain line transitions.