Solar Water Heater Turkey 1.For 5 years warranty 2.For 2 ... Sample offer 4.OEM service Working Principle Of Solar Water Heater Turkey: This system uses the thermosiphon principle, Solar ... 4mm colored steel or 0.4 mm SUS304-2B.3. Stand: galvanized steel with painting, or aluminium alloy, or ... tank heat insulation layer: 50~60 mm polyurethane foam.5. Stand angle: 15 degree, 20 degree, 25 degree, 30 degree ...