All you need to do is place an expander ring onto the PEX pipe you want to use that's properly sized for the fitting you're aiming for, and then stick the tip of the expander tool into the opening.
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How To Fix Kinks in PEX Pipes
This releases the water inside the kinked section of PEX. Relieve any strain that caused the kink in the pipe. Use a PEX pipe ...
Crosslinked polyethylene piping, better known as PEX piping, is great to have alongside your tools for home-improvement jobs, whether it's professional plumbing installation or just a bit of DIY ...