With a flare fitting on the end of a copper pipe, you can make a very strong connection between joints and elbows in the water supply pipes. Making a flare fitting in a copper pipe is quite easily done and perfected with just a few tries.
Step 1 - Cut Pipe Square
Before you can put in the flare fitting you will need to make sure that the end of the pipe is square. Use a pipe cutter to cut the end of the copper pipe to ensure it is square.
Step 2 - Deburr Copper Pipe
Once the cut is made at the end of the pipe you will need to use some emery cloth, or wet sandpaper, to remove any burrs that are left.
Step 3 - Slide Flare Nut Onto Pipe
Take one side of the flare nut and slide it onto the copper pipe. Slide it back a little to keep it out of the way.
Step 4 - Create Flare in Pipe
Using the flare tool, place it on the end of the copper pipe and set the diameter. Place the flare cone over the pipe opening and tighten the cone into the tool's vise.
Step 5 - Check End for Splits
With the fitting on examine the end for any splits. If there are none, slide the nut onto the fitting and make sure it is tight. Attach it to the end of a threaded pipe and tighten.