Chlorinated polyvinyl chloride (CPVC) is created by subjecting PVC resin to a post chlorination reaction that results in additional chlorine atoms on the base molecule. This results in a thermoplastic material similar to PVC with added advantages: a higher heat distortion temperature and improved fire performance properties at relatively low cost compared to alternative materials. As with PVC, the physical properties of CPVC can be altered considerably to provide desirable properties by compounding techniques. CPVC provides an economic solution for piping utilized in process piping, hot water, and similar service applications where operating conditions exceed the recommended temperature limits of PVC.