Concentrated solar hot water system, if all collectors used in all in series, the collector head loss cycle is too large, too long collect heat, affect the stability of the water temperature, but can be relatively save pipe, if all breeding in parallel form, although the collector loop head loss is reduced, but the mains passing long nor desirable. Should therefore be a combination of both, at the same time, we must consider the city collector arrangement, unless the guarantee at any point within the collector arrays can be balanced by a very precise control of the means of low thermal energy output. Also in the direct filling the vacuum fiberglass water collector collector series system should be used with caution in order to avoid any damage caused by a glass tube paralyzed the entire system. For the separation pressure is a solar water heating system with forced circulation machine should collect heat, and water distribution systems for fixed temperature, you can use cold water pressure roof water harvesting heat. Zaozhuang Wall Zhejiang Yi Puli sale and installation of solar water heaters, Ltd. will be responsible for full maintenance services, professional installation team, first-class service concept, two-year warranty no reason