Our PPR pipes&fittings for both hot water and cold water, in different colors,the best quality,the best price and ... : ISO9001:2000;7. Applications:Cold or hot water supply, heating system including flooring heating, wall heating and radiating system, central air conditioning system, ... conductivity which is only 1/1500 of brass pipe, and 1/250 of steel pipe;3. Non-toxic: No heavy metal additives ...