Which of the following is NOT a type of water storage facility?

The selection of PTO Tanks as the correct answer identifies it as not being a recognized type of water storage facility. Each of the other options represents a specific and commonly used water storage solution.

Elevated Tanks are designed to store water at a height, providing the necessary pressure for distribution in a water system. This height ensures that water can flow through the system effectively, relying on gravity to maintain pressure and facilitate delivery to consumers.

Ground Storage Tanks are typically built below ground level and serve to store large volumes of water, often used to balance supply and demand within a water distribution system. These tanks help ensure that adequate water is available during peak usage times or in emergencies.

Pressure Tanks, on the other hand, are utilized within the distribution system to maintain water pressure and ensure that there is a steady flow without fluctuations. They prevent the system from collapsing under low pressure and help manage the demands of changing water usage throughout the day.

PTO Tanks, however, do not fall into the standard categories of water storage facilities within water distribution systems. Therefore, highlighting PTO Tanks shows an understanding of the types of infrastructure that are commonly employed to manage water resources effectively.