3/4 inch Brass Union Copper x Copper

3/4 Inch Brass Union – Copper x Copper, Lead-Free, Sweat Connection

The 3/4 inch Brass Union Copper x Copper is a robust component designed for permanent or serviceable connections between two copper tube sections. Manufactured from lead-free brass, this union meets the requirements of ANSI/NSF 61 and 372 for potable water systems and complies with applicable plumbing codes. Its two-piece body with central nut allows for pipe disconnection without cutting, making it ideal for maintenance points and modular system builds.

Technical Performance and Features

• ✅ Material: Lead-free forged brass for strength and corrosion resistance in potable water and hydronic systems.
• ✅ Connection Type: Copper sweat x sweat ends compatible with ASTM B88 Type K, L, or M hard copper tubing.
• ✅ Operating Pressure: Rated for up to 200 PSI non-shock, depending on installation and soldering method.
• ✅ Temperature Range: Suitable for use up to 250°F when properly soldered.
• ✅ Union Design: Central union nut enables disassembly and reconnection without disturbing surrounding joints.

Installation Guidelines

This union is intended for soldered copper-to-copper connections using conventional lead-free solder and flux. Ensure proper surface preparation, including cleaning, deburring, and fluxing prior to assembly. Tighten the union nut after soldering the end bodies to their respective copper tubes to avoid deformation. Use of pipe dope or tape is not required unless otherwise specified by the system engineer.

Applications in the Field

Commonly installed in residential and light commercial water distribution systems, this fitting is used in domestic hot and cold water service lines, mechanical equipment connections, and isolated fixture runs where service access is required. The union configuration allows for fast disassembly of pipe sections without cutting or press fittings.

Standards and Compliance

• ✔️ Certified to NSF/ANSI 61 and 372 (lead-free)
• ✔️ Conforms to ASTM B584 and ASME B16.18 where applicable
• ✔️ Meets federal low-lead requirements under the Safe Drinking Water Act (SDWA)

Note:

Do not use with gas systems or in applications requiring threaded connections unless specified. Always verify local plumbing codes for compatibility and installation method approval.

Engineered for reliability and code compliance, the 3/4 inch Brass Union Copper x Copper is an essential fitting for modular copper systems that require periodic access. Its compact form and union design streamline installation and future service, making it a dependable choice for professional plumbing assemblies.