PeX and CPVC tubing also comes in rigid joints or versatile rolls. The mood from the copper, whether it is a rigid joint or flexible roll, will not have an effect on the sizing.[27] PEX – cross-joined polyethylene system with mechanically joined fittings using barbs, and crimped steel or copper https://nextdoor.com/pages/alpine-plumbing-heating-and-air-san-dimas-ca/