Direct flow solar collectors,STCcollectorSuper anti-erode outer tank Feeding water automatic ... water heater,Split pressurized solar water heater,Solar water heater tube,Vacuum tube solar water heater,Heat pipe solar water heater,Solar ... C, 2.5 hours to boiling point if using single tube.5) It resists no more than 30mm hail.6) ... C470-1800/58-3030330L2.291051800*2490*175026 / 51 / 62 Direct flow collector