technical data: No  contacting point, no leakage, long lifeIt is manufactured by choosing special qualified porcelain enamel steel plate and integrated stretching one time molding process and no wire automatic plasma welding. Meanwhile being introduced recent
technology from Germany, it melts special silicon compound
after baking at 900 and inner flask steel wall and forms
special Blue Giant inner flask. It features no corrosion
forever, no leakage forever, no scale forever, no shrunken by
pumping, no broken by pressing, etc. It is unique special inner
flask in China .Particularly it is suitable for salina,
seawater, deep well at different region. Its operation life
will be over 15 years. And this type solar water heater has won
the Britain Gold Crown Award