Splicing copper tubing is a common task for anyone doing minor plumbing work. Whether you need to add a new valve, water supply, dishwasher, or outdoor water spigot, you’ll often need to splice into the existing copper supply tubes. Here’s how to do it:
Cut the Copper Pipe
Use a tubing cutter or hacksaw to make a clean, square cut on the copper pipe where you want to make the splice. Remove any burrs or sharp edges with a file or emery cloth.
Prepare the Fittings
Choose the appropriate fittings for your splice, such as a coupling, union, or tee. Make sure the fittings are the correct size for your copper pipe. Clean the inside of the fittings and the outside of the pipe with emery cloth or steel wool to remove any dirt or oxidation.
Solder the Splice
Apply flux to the cleaned surfaces of the pipe and fittings. Insert the pipe into the fitting, making sure it’s fully seated. Heat the joint with a propane torch or MAPP gas torch until the flux bubbles and smokes. Feed lead-free solder into the joint until it’s filled. Allow the joint to cool completely before moving the pipe.
If you’re not comfortable using a torch, you can use push-fit or compression fittings instead. These require no soldering and are easier to install, but they may not be as secure as a soldered joint.
With the right tools and a little practice, you can easily splice copper tubing for your plumbing projects. Just remember to always turn off the water supply before working on any pipes.