pressurized solar water heater 1.solar keymark,SRCC,ISO9001,CCC,CE 2.durable,green,enviromental economical 3.OEM is welcomed Intergrate unpressurized solar water heater non-pressurized solar water heater,solar hot water heater,OEM solar water heater *Materials: A) Inner tank:SUS304-2B food grade stainless steel B) Outer tank: Galvanized steel sheet C) Bracket: Aluminum alloy*Thickness:A) Inner ...