What feature is essential for a duplex sump system during stormwater collection?

An emergency power source is essential for a duplex sump system during stormwater collection because it ensures the continuous operation of the pumps, even during power outages, which can be critical during severe weather events. Stormwater systems are often used in scenarios where heavy rain can lead to flooding; if the power fails, the sump pumps would not be able to operate, potentially leading to water accumulation and flooding. An emergency power source, like a backup generator, provides the reliability needed to maintain water removal during these times, protecting property and infrastructure from stormwater damage.

While larger basin sizes, multiple pumps, and manual override switches are all important features for effective stormwater management, they do not have the immediate impact on operational continuity that an emergency power source provides in the event of a power failure.