What is the best way to connect PEX tubing to copper piping using a PEX to copper adapter?

The best way to connect PEX tubing to copper piping using a PEX to copper adapter is to first cut the PEX tubing to the desired length and then slide the PEX fitting onto the tubing. Next, use a crimping tool to secure the fitting onto the tubing. Finally, solder the copper adapter onto the copper piping and connect the PEX fitting to the copper adapter.