The water tank cannot be disassembled, only the vacuum tube can be removed. The method is to hold a vacuum tube with both hands and rotate it back and forth to loosen the sealing ring with the water tank, and then slowly push it into the water tank. Once the bottom of the vacuum tube is separated from the base, slowly. remove it, then remove the vacuum tubes one by one. However, pour the water into each vacuum tube and the scale will be poured out. Then add clean water inside, brush it and pour it out.
It is possible to add a hot water storage tank, but it will be more difficult.
The hot water tank of the solar water heater is an open water tank without pressure. If you want to add a water tank, the height of the added hot water tank will be higher than the original hot water. tank and the overflow pipes of the two water tanks. Pipe openings must bere maintained at the same height; The upper and lower pipe openings of the added water tank must be connected to the upper and lower pipe openings of the original water tank. If necessary, a small hot water circulation pump can be added.