heat pipe solar water heater 1) CE, ISO9001,CGC certificate; 2) heat pipe solar water heater 3) green and economical; Baoguang domestic compact unpressurized solar water heaterFeatures:1 ... )Product Weight:about 72,82,98,110,136,156Kg DescripitNon-pressurized solar water heaterinner tank materialSUS304-2B Food Class Stainless Steelouter tank ...