non pressurized solar water heater 1. Inner tank:SUS 304-2B 2.Outer tank:Stainless ... .Bracket:Stainless steel 4.srcc, supply china fashion non pressurized solar water heater vendor 1.Inner tank:SUS304/ 2BFood Grade stain steel ,0 ... /SUS202/SUS304 stainless steelStructure of tank:4 holes for air vent, overflow, water inlet and outlet, electric heaterWelding:Argon arc weldingFastening pieces ...