... :Our PPR pipes are classified as 5 pressure grade including S2, S2.5, S3.2, S4, S5. There are more than 50 ... , the liquid temperature with normal use should be lessthan 40°C, S2, S2.5, S3.2 series are of hot water pipes, the ... liquid temperature with normal use should be less than 70°C. The working life is approximately 50 years.Feature:1. Sanitary ...