1-1/4 inch Copper Union Copper x Copper

1-1/4 Inch Copper Union – C x C Solder Joint for Potable and Hydronic Applications

The 1-1/4 inch Copper Union Copper x Copper is a mechanical fitting designed to connect two copper tube sections while allowing for future disassembly. Engineered for use in water distribution and hydronic heating systems, this union offers a secure, code-compliant connection that facilitates serviceability without cutting into the system.

Constructed from lead-free copper alloy, this union meets potable water safety standards and is approved for hot and cold water applications. The union body is joined by a precision-machined center nut, which provides a tight seal at the metal-to-metal seat when properly torqued.

Product Advantages

• ✅ Sweat (C x C) Connections – Ends are designed for soldering to ASTM B88 copper tubing using lead-free solder and approved fluxes.
• ✅ Mechanical Disassembly – Center nut allows for union separation without disturbing adjacent piping, making it ideal for valve replacements, equipment access, or system maintenance.
• ✅ Lead-Free Certification – Complies with NSF/ANSI 61 and NSF/ANSI 372 for potable water systems in all jurisdictions.
• ✅ Pressure and Thermal Stability – Suitable for use in systems subject to temperature fluctuations and moderate static pressure.

Installation Guidelines

Prepare tubing ends by cleaning and deburring. Apply flux and solder each end using standard techniques for copper solder joints. Tighten the union nut to the manufacturer-recommended torque for a secure seal. Avoid using sealants on the union seat, as this may affect the integrity of the connection. Proper alignment is essential to prevent mechanical stress on the union during thermal expansion.

Typical Applications

This copper union is used in residential, commercial, and institutional systems for joining sections of Type L or M copper tubing. Common use cases include water heater tie-ins, equipment isolation valves, pump assemblies, and hydronic manifolds. It is especially useful in installations requiring periodic disconnection or access.

Material and Code Compliance

Manufactured from lead-free copper alloy to comply with the Reduction of Lead in Drinking Water Act. Certified for use in potable water systems and recognized by IPC and UPC plumbing codes.

Technical Specifications

• Material: Lead-Free Wrought Copper
• Nominal Size: 1-1/4 inch
• Connection Type: C x C (Solder/Sweat)
• Compliance: NSF/ANSI 61, NSF/ANSI 372; ASME B16.22; ASTM B75/B88

The 1-1/4 inch Copper Union provides a reliable, code-compliant method for joining copper tubing in potable water and heating systems. It offers long-term performance with the added benefit of mechanical separation, supporting efficient system maintenance and reconfiguration.