What can be deduced about a 6-storey apartment with no overhead water tank?

In a 6-storey apartment without an overhead water tank, the most logical conclusion is that it utilizes an Upfeed System. This system relies on a pressurized water supply to move water from the ground level directly to the higher floors, which is a common approach in buildings that do not incorporate gravity-fed systems like overhead tanks.

An Upfeed System typically uses pumps to lift water to the upper levels as it ensures adequate pressure and flow rates necessary for the occupants' needs. This method is especially relevant in taller structures where gravity alone isn't sufficient to deliver water effectively to the top floors.

In contrast, the other choices do not align with the scenario presented. A Downfeed System would imply that water is supplied from above, which is not possible without an overhead tank. Stating the design is wrong doesn't recognize that there are viable engineering solutions for supplying water in multi-storey buildings without overhead tanks. Lastly, while Rain-Harvesting Technology is a sustainable option, it would typically complement a water supply system rather than serve as the primary means of delivering water throughout a building.

Thus, the Upfeed System is the most appropriate deduction for a 6-storey apartment lacking an overhead water tank, as it addresses the need for water supply through mechanical means