Pressurized solar water heater The characteristic: 1 inner tank : stainless steel sus316l-1.2mm 2vacuum tube : qb-al-n/al-47-1500 3 out tank : painted steel-0.4mm, stainless steel sus304-0.4mm 4 frame: coated galvanized steel sheet-1.5mm;stainless steel sus430-1.5mm. 5the material of insulation:polyurethane 55mm 6 the reflector:aluminum component : al 99.85% surface oxidation. Characteristic: 1 this type of solar water heater works with high pressure, so do the water it prodeces. 2 it uses the heat pipe to delivery the heat energy, it can works rapidly. 3 because of no water in the vacuum tube , so there will not tube breakage in the winter. 4 each vacuum tubes can work alone, so it can still operate in the event of occasional tube breakage. G.W. 90kg