PEX
Flexible plastic tubing that bends around corners, so it needs fewer fittings and fewer wall openings. PEX-A uses expansion fittings that the pipe shrinks back onto; PEX-B usually uses crimp rings. It handles the occasional freeze better than copper.
- Best for
- Most homes, especially where new lines have to be fished through finished walls.
- Watch for
- Keep it out of direct sunlight, and ask for as few hidden joints as possible.


