The primary advantage of maintaining an elevated storage system is to ensure pressure is maintained when what circumstance occurs?

Maintaining an elevated storage system primarily serves the purpose of ensuring adequate pressure in the water distribution system, especially when supply pumps are turned off. Elevated tanks store water at a height where gravity can assist in delivering pressure to the water system. When the supply pumps are not operational, whether due to maintenance, power outages, or other issues, the elevated storage provides a reserve of water that can continue to supply the system, ensuring that there is sufficient pressure for customers and fire protection.

The other situations do not directly link to the primary function of elevated tanks as effectively. While water quality concerns or low water levels are important in the overall management of a water system, the function of maintaining pressure during pump downtime highlights the critical role of an elevated storage system.