Water Heater Tank 1. Tank in tank new design 2, CE/PED approved 3, Food ... SUS304/316L,444 4, Multi-function Hot selling Stainless Steel Water Tank Multi-function: Combined with solar heating system, heat pump ... heater and other auxiliary heating sources.Separate water : the sanitary hot water and warm water for house heating is separated, for ... several terminals, for much more clean and safe water.