... Coupling ,Socket, Cap , Tee , Adapter , Elbow , Reducer, Union , Plug , Pipe Clip , Valve , Plastic Tap, Mould, fusion welder and so on3 ... Preservation: low thermal conductivity which is only 1/5000 of copper pipe, and 1/250 of steel pipe3. Non-toxic: no ... building sports facilities etc2. Drinking water system and food industry pipe works3. Central air conditioning system and heating system for ...