Step 7 · Apply Solder

This is the step most people slow down on. Take it one move at a time — there’s no rush, and you can rewind the clip as many times as you need.

Once the joint reaches the correct temperature, remove the torch flame. Immediately touch the tip of the lead-free solder to the seam where the pipe enters the fitting. Touch it to the side opposite from where you were applying heat. Capillary action will instantly draw the molten solder into the full depth of the joint. You only need to apply solder to one or two points on the seam; it will flow all the way around. Feed the solder until you see a bright, continuous silver ring form at the seam. For a 1/2-inch pipe, this typically requires about 1/2-inch of solder. Once the joint is filled, remove the solder wire immediately. Do not apply more heat while applying solder.