Most of the regulations from the Obama administration working their way through the courts raise an issue concerning Chevron deference. The Supreme Court has before it a case, Esquivel-Quintana v. Sessions, raising the question whether Chevron deference trumps the rule of lenity in criminal cases. Auer deference has also come under attack in recent years. As with Chevron, in some circumstances the Court has declined to apply Auer deference altogether. Christopher v. SmithKline Beecham Corp., 132 S.Ct. 2156 (2012). In other cases, individual Justices have argued that it is time to reconsider Auer deference.
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.
Let me give you (and my readers) some information on both Pex and CPVC so that you can better reach an educated decision. PEX pipe is approved for potable hot- and cold-water plumbing systems and hot-water (hydronic) heating systems in all model plumbing and mechanical codes across the U.S. and Canada. PEX piping systems are durable, provide security for safe drinking water, and use reliable connections and fittings.