Non-Pressurized Solar Collector Solar Water Heater (60L 80L 100L 140L 160L 180L 240L 300L 400L 500L) Specialty 1. Economical type for most of area, common people can afford it 2. Simple product structure: Solar collector and water tank connected together directly, no need of pipe to connect, and no pump to push fluid 3. Mature technology and stable operation 4. Higher efficiency on photo thermal conversion.  5. Accessory is popular and easy maintenance Solar water heater Specifications:  1) Inner tank thickness of solar heater: 0.4mm, 360mm/370mm/380mm 2) Outer tank thickness of solar heater: 0.4mm, 460mm/470mm/480mm 3) Inner tank of solare water heater: SUS304 food grade stainless steel.  4) solar water heater Outer tank: Stainless steel, 0.4mm 5)solar water heater tank capacity: 80L/100L/120L/150L/180L/200L/240L/250L/300L 6) Thickness of solar water heater bracket: 1.5mm 7) Glass vacuum tube of solar water heater: 58mm X 1800mm Remark:  1. Solar heat storage tank diameter(mm): 460mm/480mm 2. Thickness, insulated(mm): 50mm 3. Vent connection(inch): 1/2''or /3/4'' 4. Electric heater: 47mm 1500W, 3/4'' 5. Water connection(inch): 1/2'' or 3/4'' 6. Collector angle(degree): 25-45