What is CPVC pipe?
CPVC (chlorinated polyvinyl chloride) is a thermoplastic pipe rated to handle temperatures up to 200 degrees Fahrenheit, commonly used for hot water distribution lines in homes and buildings.
Chlorinated polyvinyl chloride, or CPVC, is a rigid plastic pipe made by adding chlorine to standard PVC resin. This chemical treatment gives CPVC a higher heat tolerance than standard PVC, making it suitable for carrying hot water throughout a home. While regular PVC can only handle water up to about 140 degrees Fahrenheit, CPVC is rated for sustained temperatures up to 200 degrees Fahrenheit.
In residential plumbing, CPVC typically runs from the water heater to fixtures like showers, sinks, and washing machines. It is approved for both hot and cold water applications, though cold water uses standard PVC more often. CPVC piping is lighter than copper, does not corrode, and resists scale buildup, which can extend its lifespan. The pipes connect using solvent cement joints rather than solder or compression fittings.
One key limitation is brittleness in very cold climates. Freezing temperatures can make CPVC prone to cracking if not properly insulated. For this reason, it performs better in moderate climates like the Columbia area. Many plumbers choose CPVC for repiping jobs because it offers a cost-effective middle ground between PVC and copper. If you need to replace deteriorating hot water lines, a qualified plumber experienced with CPVC installation can assess whether this material suits your system.