... , S2.5, S3.2 have S2, S4, S5 of pipe pressure level 5 series. Nominal diameter from 20 to ... pipes with the points, S4, S5 for cold water pipe, series of normal use tube for more than 40 °C ... than 70 °C, for the service life of 50 years Residential pipe system of cold; Industrial water and chemical material conveying, ... air tube; Other industrial, agricultural tube. PPR hot and cold water pipe series