Hm, thats odd.
All of the stuff we got is clearish (like candy apple paint) with no internal reinforcement but is PEX and advertized as 400psi hot or cold capable.
Red for hot, and blue for cold.
I got on the Wirsbo/Uponor band wagon when they used the brass fittings and the rings were also pex that couldn't deteriorate. Since then they have introduced some plastic fittings in the mix and I am not very happy with that idea.
