What is CPVC pipe?
CPVC (chlorinated polyvinyl chloride) pipe is a plastic water supply pipe rated for temperatures up to 180°F, used primarily for hot water lines in residential plumbing systems.
Chlorinated polyvinyl chloride, or CPVC, is a rigid plastic water supply pipe that handles hot water without degrading. Unlike standard PVC, which tops out around 140°F, CPVC maintains its structural integrity at temperatures up to 180°F, making it suitable for hot water lines running from water heaters to fixtures throughout a home.
CPVC pipe comes in various diameters (typically 1/2-inch and 3/4-inch for residential use) and connects via solvent-welded joints using specialized cement designed for the material. The pipes are cream or tan-colored and slightly thicker than comparable copper or PEX alternatives. In Aiken homes, plumbers choose CPVC for affordability and ease of installation compared to traditional copper, particularly on longer runs where flexibility matters less than cost.
The material performs reliably in standard residential applications but has limitations. It cannot handle the extreme temperatures of recirculating systems in some commercial settings, and connection fittings must match the CPVC specification. Freezing conditions can make CPVC brittle if left uninsulated in unheated spaces, so protection is necessary in basements or crawl spaces during winter.
When replacing or expanding your home's hot water lines, local residential plumbers can assess whether CPVC meets your system's needs and install it to code.