... resistance,light weight, good mechanical strength and heat-resisting performance, PEX/AL/PEX PIPE 1, Non-toxic, corrosion resistance,light weight, good mechanical ... resistance inside pipe is small, not easy scaling, fluid not being polluted, and effective large diameter. 3, 100% insulating oxygen,stop oxygen's ... ,parking lot,ourdoor sport fileds,Fry pond and heated greenhouse. pex-al-pex pipe