Pex connections failing

zosoplumber

I'm pretty sure there are no pex fitings or connection that use ferrels, I've only worked with crimp rings, and have seen a demonstration on the memory pex, are you sure it is a ferrell and not a crimp ring, the ring would look just like it sounds, and about 1/4 " in width, the ring is copper but would look darker, almost black.

Termite

I've never seen any sort of PEX that uses ferrules or any sort of threaded/compression connection.

Would you be able to post a picture of this?

For an easy DIYer-friendly tool-less fix, take a look at the "Sharkbite" fittings. They're great for PEX as long as the connections are accessible.