It’s possible to kink PEX tubing if you bend it too tightly. When using PEX-B or PEX-C grade pipe you will normally want to cut the affected piece of tubing out of the line and replace it with a coupling, depending on the severity of the kink. Applying heat aids in fixing kinked PEX. Using a heat gun on kinked PEX-A can restore the tubing to its original shape (watch our video below to see how). In the absence of a heat gun, a hair dryer can be used, but the process will take longer and may not be as effective. PEX-A provides the additional benefits of greater flexibility, added freeze protection, and compatibility with expansion-type fittings.