solar water heater 1)Price EXW 2) ISO9001,CE; 3)Flexible configuration; 4)Durable and high-dense welding; solar water heater1. ... 47/58mm) 7. The vacuum tube of our solar water heater has the high absorption rate and low emission ... 16, 18, 20, 24, 26, 28 , 30and36 tubes 14. Capacity: 130 to 300L 15. Characteristics: 1.Best ... and prevent electricity7.Environmental friendly vacuum tubes solar water heater