3/4 inch x 3/8 inch Copper Reducing Coupling Lead-Free Copper x Copper

3/4 inch x 3/8 inch Copper Reducing Coupling – Wrought Copper Fitting for Soldered Transitions

The 3/4 inch x 3/8 inch Copper Reducing Coupling is a solder joint fitting manufactured from lead-free wrought copper (ASTM B75, Alloy C12200) designed to connect copper tube of dissimilar sizes in fluid handling systems. This coupling provides a smooth internal bore transition, minimizing turbulence and optimizing flow characteristics in potable water and hydronic heating installations.

Its uniform wall thickness and tight dimensional tolerances ensure consistent heat transfer and solder fill during installation. The fitting meets the dimensional and performance criteria of ASME B16.22 and is suitable for joining standard Type L or M copper tubing under building code-approved conditions.

Product Features

• ✅ Material: Lead-free wrought copper (C12200) for high thermal conductivity and corrosion resistance in water-based systems.
• ✅ End Configuration: Solder (cup) ends sized for 3/4 inch and 3/8 inch nominal copper tubing.
• ✅ Standard Compliance: Conforms to ASME B16.22 and NSF/ANSI 61 & 372 for use in potable water systems.
• ✅ Pressure Rating: Compatible with system pressures up to 200 PSI at 180°F when properly installed and supported.
• ✅ Transition Design: Center-stop construction aligns tubing for consistent insertion depth and joint integrity.

Technical Specifications

• Material: Copper (Alloy C12200, DHP grade)
• Size: 3/4 inch x 3/8 inch nominal
• Connection Type: Solder x Solder
• Standards: ASME B16.22, ASTM B75, NSF/ANSI 61 & 372

Installation Guidelines

For proper performance, tubing ends should be deburred, cleaned, and fluxed prior to assembly. Apply heat evenly and allow solder to wick fully into the capillary space. Avoid excessive heat exposure to prevent annealing. Recommended for use with silver-bearing solders conforming to ASTM B813 where required by code.

Applications

Used in water distribution, radiant heating loops, and branch connections requiring a reduction in line diameter. Suitable for concealed and exposed piping systems in both residential and commercial settings, especially where code-mandated lead-free materials are required.

Code and Safety Notes

This reducing coupling is lead-free and approved for use in potable water systems under the Safe Drinking Water Act. It is not intended for use in fuel gas, steam, or compressed air systems unless specifically rated for such service.