... 2.AENOR,WATERMARK,EME,ISO Certificates 3.Butt welding pipe 4.For hot water 5.Factory price 1. ... WATERMARK,AENOR,EME,ISO certificates verify,PEX AL PEX pipe is widely used for underfloor heating.TÜV ... control management system.4.Butt-welded PEX AL PEX pipe is made of 5layers,both inner and outer ... aImgSrc': aBigImageSrc } ); } )(); STARWIN underfloor heating pipes--PEX-AL-PEX multilayer pipe,plastic pipe