If you tried to stick a PEX pipe into a larger fitting like that, all you're going to get is leaks and water damage. The purpose of a PEX expander is to physically increase the size of the opening ...

So working with a coil of PEX is like wrestling with a giant Slinky. For most jobs, you’re better off buying 10-ft. “sticks” instead. You may have to pay a few cents more per foot and ...