can you use compression fittings with pex
Brickeyee is on the point. ALL PEX piping uses some sort of Barb fitting with a compression ring. I have never ever heard of a single failure with this type system. Compression fittings use a ferrule either brass or plastic. The brass ferrule bites into the pipe wall, but the plastic ferrule does not. It is not a surprise to me that a Compression fitting which has a plastic ferrule failed.