Using a tape measure, carefully determine the required length of the copper pipe for your installation. Account for the 'fitting socket depth'—the length of pipe that will slide into the fitting. Mark the precise cutting line on the pipe's surface using a permanent marker. A clear, all-around mark ensures you can keep the cut straight.
Step 1
⏱ 2 minMeasure and Mark the Pipe
Step 2
⏱ 2 min
Cut the Copper Pipe
Position the tubing cutter on the pipe so the cutting wheel aligns perfectly with your marked line. Lightly tighten the knob until the wheel makes firm contact. Rotate the cutter around the pipe, following the mark. After each full rotation, give the knob a small turn (about a quarter-turn) to increase pressure. Continue this rotate-and-tighten process smoothly and evenly. Do not overtighten, as this can deform the pipe. The pipe will snap off cleanly when the cut is complete.
Step 3
⏱ 2 min
Deburr the Pipe Interior and Exterior
The cutting process creates a small ridge, or 'burr', on the inside edge of the pipe. This must be removed to ensure proper water flow and prevent turbulence. Use a deburring tool, the triangular reamer on the back of many tubing cutters, or a round file. Insert the tool into the pipe opening and twist it several times to shave off the burr, creating a smooth, beveled inner edge. Also, lightly file the outside edge to remove any sharpness or external burrs.
Step 4
⏱ 2 min
Clean the Pipe Exterior
For solder to adhere, the copper surface must be perfectly clean and free of oxidation. Use a dedicated pipe cleaning brush or a strip of sanding cloth (emery cloth) to thoroughly clean the outside of the pipe end. Sand the surface for a distance slightly greater than the depth of the fitting socket. The goal is to remove the dull outer layer until the copper is bright, shiny, and salmon-colored. Wipe away any dust with a clean, dry rag.
Step 5
⏱ 2 min
Clean the Fitting Interior
Just as with the pipe, the inside of the copper fitting must also be perfectly clean. Use a fitting brush, which is a wire brush sized specifically for the fitting's diameter. Insert the brush into the fitting's socket and twist it vigorously back and forth several times. Inspect the inside to ensure it is also bright, shiny, and free from any dirt, grease, or oxidation.
Step 1/5
Measure and Mark the Pipe2 min