At what temperature does PVC pipe start to decompose?

PVC (Polyvinyl Chloride) pipe begins to decompose when exposed to high temperatures, specifically within the range of 401 to 411 degrees Fahrenheit. At these temperatures, the chemical structure of PVC starts to break down, leading to the release of byproducts and potential loss of mechanical strength and integrity in the pipe. This is crucial information for plumbing contractors, as exposure to temperatures above this range can compromise the functionality of the pipe, potentially leading to leaks or failures in a plumbing system. Understanding the thermal limits of PVC is essential for ensuring the longevity and reliability of installations, particularly in environments where heat may be a factor.