What is a tank that is greater in height than diameter called?

A tank that is greater in height than diameter is referred to as a standpipe. Standpipes are vertical storage tanks commonly used for water supply systems to maintain pressure and provide water during peak usage times. The tall and slender design of a standpipe allows it to efficiently manage large volumes of water while minimizing the footprint on the ground.

The height of the standpipe contributes to the development of water pressure due to the hydraulic head; as the height increases, so does the pressure at the base of the tank. This is vital for urban water distribution systems, as it ensures that water can be delivered effectively to various elevations within a service area.

Hydropneumatic tanks, pressure tanks, and storage tanks serve different functions. Hydropneumatic tanks are designed to maintain water pressure and store water for periods of high demand, while pressure tanks manage air pressure and water storage in a more compact design. Storage tanks are generally used to hold large volumes of water but may not adhere to the specific height-to-diameter ratio that characterizes a standpipe.