3/4 inch Copper Union Copper x Copper

3/4" Copper Union – Designed for Reliable System Disassembly and Maintenance

The 3/4" Copper Union is a mechanical fitting engineered to facilitate easy disconnection and reconnection of copper piping systems. It provides a secure joint between two copper tubes while allowing future access for system servicing, modification, or expansion without requiring pipe cutting or excessive rework.

This union is machined from high-grade copper, offering corrosion resistance and compliance with potable water standards. Its two-part design, joined via a central threaded nut, delivers structural integrity under normal operating pressures and temperatures encountered in hot and cold water supply systems.

Key Advantages for Trade Professionals

Designed with long-term system reliability in mind, this copper union supports field efficiency and meets jobsite performance expectations:

• ✅ Permanent Yet Serviceable – Allows for temporary separation of joined pipes without compromising joint integrity.
• ✅ Alloy Compatibility – Compatible with copper tubing and fittings in both Type L and Type M systems.
• ✅ Pressure-Rated Construction – Suitable for domestic water, hydronic heating, and low-pressure HVAC applications.
• ✅ Lead-Free Compliance – Manufactured in accordance with no-lead requirements for potable water use.
• ✅ Sweat Connection Ends – Designed for soldered connections using standard brazing or soldering techniques.

Technical Specifications

• Material: Wrought Copper Alloy (Lead-Free)
• Nominal Size: 3/4 inch
• Connection Ends: Sweat (Copper x Copper)
• Conformance: Meets ASME B16.22 and NSF/ANSI 61 standards

Installation Considerations

This union requires proper cleaning, fluxing, and heating procedures for secure sweat connections. Standard plumbing torches and lead-free solder should be used to ensure a watertight seal. Threaded nut must be evenly torqued to avoid stress points or misalignment. Not intended for press-fit or push-to-connect systems.

Applications

Widely used in hot and cold water supply lines, boiler connections, hydronic manifolds, and mechanical rooms, this fitting is suited for both new construction and retrofit projects requiring future accessibility without system disruption.

Code and System Design Note

All unions used in potable water systems must meet lead-free requirements as defined under the Safe Drinking Water Act (SDWA). This union complies with those regulations and is marked accordingly for inspection and approval purposes.