PEX-AL-PEX PIPE FOR HOT WATER, VERLAP-WELDING AND BUTT-WELDING ... ,1418,1620,2025,.. color is up to the buyer Pex-al-pex composite pipe 1.Main size:1216(1/2")1620 ... ,ASTM F1281,DIN 4726 4.OEM service available 5.Application: a)Underfloor heating; b)Heating system of radiator and wall; c ...