What is the purpose of a water storage tank in a water system?

The purpose of a water storage tank in a water system is primarily to provide a reserve of water for periods of high demand and to maintain pressure within the system. Water storage tanks act as buffers that ensure a steady supply of water, especially during times when the water demand exceeds the immediate supply capabilities of the water treatment plant or distribution system.

When there is an increased demand for water, such as during peak usage times, the tank can deliver the necessary volume of water to meet this demand without straining the supply system. Additionally, having water stored in a tank helps to ensure that the pressure in the distribution system remains consistent, which is crucial for delivering water effectively to homes and businesses. Proper pressure is also important for keeping water flowing freely through the system and preventing backflow.

While filtering contaminants, storing treatment chemicals, and measuring flow rates are all important aspects of water management and treatment, they do not represent the primary function of a storage tank. The key role of such tanks is to ensure adequate supply and consistent pressure, making option B the most accurate choice.