... .environment friendly 2.energy saving solar water heaters,solar water heater,Flat panel compact pressure systemHorizontal pressure water tank 1.Type of tank ... ,safty performance higher. Before delivery ,the enmel water tank must to passed2 main high pressure test ... ,suitable for any water source even with Ca ,Mg, Cl ect components. Heat absorber Flat plate collector, TiNOx coatingFlowing tube ...