Construct a copper tubing assembly using solder joints.

Construction should include these steps:

• Clean pipe with sandpaper or a wire brush.
• Apply flux with a brush.
• Apply heat for solder.
• Apply solder.
• Test the assembly for leaks.
• Wipe off excess flux after the assembly cools.

Process/Skill Questions:

• What scientific principle allows molten solder to flow into a joint?
• What material must be absent from solder used in domestic water systems?
• Why is flux so important in soldering?