... 30000L Split Pressure Solar Water Heater:Vacuum tubes assimilate the advance 12 layers of spattering deposit of rivalent element technology, high borosilicate glass, ... a strong heating ability, Certificate, CE, CCC, ISO 9001, Solar Keymark.Features:1) Highest efficiency2) Furnished in good style, with ... imported galvanized steel plate4) Isolation: 50/55 polyurethane Split Pressure Solar Water Heater