... 1ISO,EN12975,CE 2lifetime>15years,the gaurantee3years 3economic best family solar collector the best price solar collector1)light-wiehgt, easy installation and ... fin:Unify aluminium sheet.8 Working pressure:0.6Mpa or 0.7Mpa.Pressurized water tank.1 Out tank shell , there are different ... freely.2inner thank, SUS304-2B stainless steel, thickness about 1.2mm, it keeps the water clean and drinkable and ...