1.CONSTAB PEX,Al raw material 2.AENOR,WATERMARK,EME,ISO Certificate 3.Butt welding pipe 4.For hot water 5.Factory price 1 ... ,the best material in the world 2.With WATERMARK,AENOR,EME,ISO certificates verify,PEX AL PEX pipe is widely used for underfloor heating.T ... .We have perfect quality control management system.4.Butt-welded PEX AL PEX pipe is made of 5layers,both inner and outer layers are ...