What is CPVC pipe?
CPVC (chlorinated polyvinyl chloride) pipe is a rigid plastic piping material engineered to handle hot water temperatures and commonly used for residential water supply lines, especially in older homes in the Greater Hartford area.
Chlorinated polyvinyl chloride pipe carries hot and cold water through residential plumbing systems. The chlorination process modifies standard PVC's chemical structure, allowing CPVC to withstand temperatures up to 200 degrees Fahrenheit without degrading or becoming brittle. This heat tolerance makes it the standard choice for household hot water supply lines, whereas regular PVC fails in those applications and is restricted by code to cold water only.
CPVC pipe resembles PVC visually but requires different fittings and primers during installation. Many homes built in Connecticut, particularly in Hartford County, still use CPVC for their primary hot water lines installed during the 1980s and 1990s. The material itself does not corrode and resists scale buildup, which extends its service life compared to copper in hard water areas. However, CPVC can become brittle with age and exposure to ultraviolet light, leading to cracks or leaks in exposed sections or in attics with poor ventilation.
Plumbers in Greater Hartford often encounter CPVC during repairs and upgrades. If a section develops leaks, repair or replacement typically involves cutting out the damaged portion and installing new fittings with slip couplings or rebuilding the connection. Because CPVC connections are solvent-welded rather than mechanically joined, proper technique during installation or repair directly affects longevity and water tightness. Anyone investigating persistent leaks or discolored water in an older home may benefit from having a plumber assess whether CPVC degradation is the source.