A plumber is installing a copper potable water line in a new residential build. The specifications require a permanent, leak-proof joint with minimal heat application. Which joining method would be most appropriate given these requirements?

Question: A plumber is installing a copper potable water line in a new residential build. The specifications require a permanent, leak-proof joint with minimal heat application. Which joining method would be most appropriate given these requirements?

Answer options: ✅ Press-connect with annealed copper tubing

• Soldering with 95/5 tin-antimony solder
• Flaring with a brass union
• Compression fitting with a plastic ferrule

Correct answer: Press-connect with annealed copper tubing

Explanation: Press-connect fittings offer a permanent, leak-proof joint without the need for an open flame, making them ideal for sensitive installations and minimizing heat application. While soldering creates a strong joint, it requires significant heat, and flaring or compression fittings are generally not preferred for permanent potable water lines where press-connect is an option.