Which step describes burr removal during pipe prep for soldering?

• A. Burrs must be removed from the inside of the pipe using a wire brush
• B. Solder is applied before cleaning
• C. The joint is filled with solder first
• D. Heat is applied before cleaning

Answer: (A)

Burr removal focuses on smoothing the edge inside the pipe so solder can flow evenly and form a strong seal. After cutting, sharp burrs inside the bore can trap debris or prevent the solder from wetting the metal properly. Using a wire brush to remove those inside burrs creates a clean, smooth interior surface, which helps the flux and solder wet the joint and fill it completely. If you solder before cleaning, or heat before cleaning, you would risk trapping contaminants and not getting a proper bond, which is why those steps aren’t appropriate in preparing the joint.