Cut the pipe using a standard copper pipe cutter. Avoid exerting too much pressure on the pipe, as it may deform its’ round shape.
Using Cash Acme U702 tool or a standard copper reamer, ream the outside of the copper pipe so that it looks clean.
Mark the pipe insertion depth using the same tool or refer to the pipe depth insertion chart.
While removing a PEX insert is not required, it will reduce the flow through the copper pipe and is often removed. To remove the insert, follow the steps below. First, using needlenose pliers, grab the PEX insert. Second, pull the insert gently past the o-ring until the retainer ring (steel ring with teeth) stop it. Finally, use the disconnect clip as described in "how to disconnect" part to release the locking mechanism and pull out the insert.