To do so follow the following 4 simple steps: 1. Cut the pipe with the suitable pex al pex cutters - ensure the cut is clean 2. Ream the pipe to the appropriate size with a pex al pex reamer 3. Install the compression nut over the pipe, followed by the O-ring and then fully insert the main body of the pex al pex compression fitting into the pipe 4. Slide the nut and O-ring towards the fitting and tighten the compression nut with a crescent wrench.