PPR pipes can serve you for more than 50 years under varying environmental conditions and a wide range of fluids. What is more, PPR pipes can withstand both cold and hot water systems. To help you understand, PPR pipes can handle the pressure and strain of hot water without breaking. ; Of course, the premise is that the 50-year life span can only be guaranteed under normal use conditions, such as protecting the pipeline under extreme weather. http://www.oneplusplastic.com/plastic-pipe/pvc-pipe/