It's ppr pipes, these are safe, cheap, easy to install they are just great.In case you didnt know, copper has anti bacterial properties. That's why it is better to use them in water systems.What the hell kinda pipe system is that? It's not pex, but tool is like pump up pex and pipe like green PVC I've never seen this.If only America would not defraud it's people, it would be easier and cheaper to fix things.