CPVC needs to be used for hot water piping. PVC starts getting soft well below the boiling point of water. Not sure at what temp. I read on this forum somewhere a long ago that some people use it for a couple feet close to a pool heater interface so there is a reduced chance of softening if the flow is stopped while the heater is on and before the interlocks kick it off. An unnecessary overkill for your application.
Al