Step 4:

In this step, we cut a small piece of 1/2" copper pipe to insert into one end of the T coupling and then put the other two ends of the T coupling onto the ends of the pipe we cut and sanded. (Note: we did have to use a different pipe cutting tool in this step as the tool we used to cut the 3/4" pipe originally only works with 3/4" pipes. Luckily one of us had one!)