What should be done if PEX is exposed to prolonged exposure to free chlorine?

The correct answer highlights the importance of understanding the compatibility of PEX (cross-linked polyethylene) piping with various substances, particularly free chlorine. PEX is commonly used in plumbing due to its flexibility and resistance to scale and chlorine, but it is still susceptible to degradation if exposed to high levels of free chlorine over an extended period. Prolonged exposure to free chlorine can lead to discoloration, loss of mechanical properties, and ultimately, a failure of the piping system.

By recognizing that PEX should not be installed in conditions where it may be continuously exposed to elevated free chlorine levels, installers can prevent potential failures and maintain the integrity of the plumbing system. Therefore, careful consideration of the environment and chemical exposure is essential when choosing materials for plumbing applications. This ensures long-term durability and reliability of the system, reinforcing the idea that appropriate materials selection is critical in plumbing installation practices.