Indirect Thermosiphon Solar Water Heater Our price is very competitive because we are manufactory, we are the source. Working principle 1) When the discrepant temperature of the solar collector and water tank reaches the set value, the controller shall start the circulation pump automatically 2) The circulation pump makes heat-conducting liquid circulate automatically 3) The heat-conducting liquid transfers heat to water by heat exchanger in the water tank 4) In case the temperature of the water tank does not reach Tmax, then start the auxiliary heating device 5) If discrepant temperature of the collector and the water tank does not reach the set value, the circulation pump shall be shut automatically Characteristic 1.Adopting advanced automatic welding equipment and technics , ensure no leakage anti-corrosion , good integrity 2.Start fast, the heat absorbed can be transferred to the water tank by heat conductor pipe rapidly 3.Water heaters can be under pressure 1.5kgf/m2 4.The water tank and heat pipe are solid sealed mechanically, water heater can still work well even though few vacuum tubes were broken. 5.The design of this type production is according with the international market,adopted copper coil as heat exchanger. And it is easy to installation and operation 6.Easy to fix,More stable fasten and resistance 7.Excellent designing new type 8.Simple structure, easy plug-in installation, can be installed both on flat and inclined roof, 9.stable and reliable performance, well wind resistance 10.Can be used all year round even in the cold weather High efficiency; Environment protective; Safe and Economy; No limit in weather; Automatic control system; Fashionable;Professional design. Technic Specification,based at specific degree of input water with 20°c, and output hot water with 55°c; Working condition suitable for -5 -40°c. Applications The solar collector can be installed in solar heating systems to heat water for a wide variety of uses, including home, hotel, school, business projects and industrial uses. When in series or parallel connection, it also can be used to heat swimming pools, and supply heat for underfloor heating or air conditionin