... , drinking water pipeline system, the product is a green building materials.4. Due to the existence ... middle layer of aluminum, the expansion co-efficient a samll metal pipe with considerable strength, toughness, impact ... life of up to 50 years. codedimensionpackage (m.)8P02.16516x2,0058P02.18518x2,0058P02.20520x2,2558P02.201520x2, ... 5058P02.63563x6,0058P02.75575x7,505 pex-a,pex-b underfloor heating pipe