I have not worked with CPVC pipe before the project I'm working now. Customer wants to use CPVC pipe and fittings in conjunction with existing PVC. I've been told by various suppliers that the glue used for CPVC and the glue used for PVC are not compatible. I know I can use mechanical connections to join the two different types of pipe in some areas but not all. There must be a glue manufactured that will work to join PVC and CPVC or I would think one of the glues would work for both types. If anyone else has experienced my dilemma or knows with 100% certainty one way or the other. I welcome your responses and input.