... thermal conductivity which is only 1/1500 of brass pipe, and 1/250 of steel pipe3. Non- ... specification all can be supplied1,S5 series1.25MPa for clean cold water conveyance . 20mm*2.0mm, ... , 110mm*10mm. S3.2 series:2.0MPa for Hot water clean hot water conveyance20mm*2.8mm,25mm ... , 110mm*15.1mm.. S4 series 1.6MPa for clean potable water conveyance.20 20mm*2.0mm,25mm ... 4mm,90mm*10mm.110mm*12.3mm PPR pipe