... water, 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 ... silk, and it will just take a few seconds to complete a joint connections,and metal water pipes ... ,5058P02.63563x6,0058P02.75575x7,505 pex multilayer pipe for underfloor heating