... colors on requ Features:Connection: socket fusion joint, electro fusion joint or transition joint Standard: GB/T18742.2-2002,GB/T18742 ... water supply, heating system including flooring heating, wall heating and radiating system, Central air conditioning system, industrial liquids transportation ... which is only 1/1500 of brass pipe, and 1/250 of steel pipe Non-toxic: no heavy metal additives, ...