Step 4 · Prepare Pipes for Installation
Proper pipe preparation is essential for a leak-free solder joint. Take a deburring tool and insert it into the end of each cut pipe, rotating it to remove the sharp inner burr created by the cutter. Then, use sand cloth or an emery cloth to thoroughly clean and polish the outside of the pipe ends (about 1 inch back from the end) and the inside of the new copper fittings until the copper is bright and shiny. This removes any oxidation and surface contaminants that could prevent the solder from flowing properly.