... 2.energy saving solar water heaters,solar water heater,Flat panel compact pressure systemHorizontal pressure water tank 1.Type of tank Pressurized, , working pressure up to 650Kpa ... higher. Before delivery ,the enmel water tank must to passed2 main high pressure test .enmal 9 bar titanium steel ... at most.No metal material in the water tank ,hard forforming chemical transformation ,suitable for any ...