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

1/2" x 3/8" Copper Reducing Coupling – C x C Sweat Fitting

The 1/2" x 3/8" Copper Reducing Coupling is designed for connecting two copper tube lines of differing diameters in hydronic and potable water systems. This copper sweat fitting features a solder cup on each end to accommodate tube sizes 1/2 inch and 3/8 inch (nominal CTS), enabling smooth transitions in line size without sacrificing system performance.

Manufactured from lead-free wrought copper alloy per ASTM B75 or B88, this fitting meets NSF/ANSI 61 and 372 certifications for potable water applications. It supports soft- and hard-drawn copper tubing and is pressure-rated for standard residential and light commercial installations.

Product Specifications

• Material: Lead-free copper (ASTM B75/B88)
• Size: 1/2" x 3/8" nominal tubing
• Connection Type: Sweat (C x C – Copper Tube Size)
• Pressure Rating: 200 PSI (typical for soldered copper systems)
• Temperature Rating: Up to 400°F with soldered connection
• Standards: NSF/ANSI 61 & 372; ASME B16.22 compliant

Applications

• • Hot and cold water distribution lines
• • Hydronic heating circuits
• • Radiant floor systems
• • Retrofit or new construction transitions

Installation Notes

This reducing coupling requires soldering to copper tube. Proper cleaning, flux application, and heat control are necessary to ensure a strong and leak-free joint. It is recommended to follow manufacturer and code specifications for preparation and soldering techniques. Use with lead-free solder for potable systems to ensure compliance with federal drinking water standards.

Note:

This fitting is not suitable for press-connect or push-fit systems. Use only with solder joint copper piping systems.

Engineered to meet plumbing code requirements for clean, corrosion-resistant, and reliable fluid transfer, the 1/2" x 3/8" Copper Reducing Coupling is a standard component in professional-grade water and mechanical system installations.