FlowGuard Plus CPVC has a better thermal expansion coefficient compared to other plastics—almost half of the PPR and PEX pipes’ thermal coefficient.
Compared to metal pipes and metal reinforced plastics (multilayer pipes), FlowGuard Plus CPVC piping will expand about 4 inches per 100 feet with a 37.7℃ temperature change. The fact that FlowGuard Plus CPVC has higher thermal expansion than metals is due to the difference in elastic modulus.