CPVC, PVC Pipes, and Ultraviolet Radiation
UV light radiation can cause portions of the outer shell of CPVC and PVC pipes to degrade slightly, but not significantly. Pipes that are exposed to sunlight will slowly begin to have a visible variation, called “UV Discoloration”. Depending on the pipes’ color, it can start to have a brownish or yellowish tint. When exposed to direct sunlight, CPVC and PVC shows “UV degradation”, but only between 0.001 to 0.003 inches. Once pipes are removed from the direct exposure, the ultraviolet rays no longer affect them.