... industry solar water heater supply hot water for factory, hotel, school, and so on. solar collector Working principle:Combined many collectors with water storage ... : 500L, 1000L,5000L, 10000L, and so on.2. Outer manifold material: Al-Zn coated steel sheet/color steel / stainless steel ... : 0.4mm3. Inner manifold material: SUS 304-2B stainless steel sheet : 0.4-0 ...