What is a sump pit used for in water facilities?

A sump pit is primarily designed to collect and manage excess water or runoff in water facilities. These pits are typically located in low-lying areas and serve as a reservoir for water that accumulates due to various sources such as rainwater, groundwater, or other forms of excess moisture. Once collected, a sump pump is utilized to remove the water from the pit, preventing flooding and ensuring that the facility operates efficiently. This is crucial for maintaining safety and proper functioning within the facility, as excessive water can damage equipment and disrupt operations.

The other options relate to different functions within water management. Storing chemicals is a separate function that requires specific containment measures; monitoring water pressure levels involves instruments designed for that purpose; and filtering impurities is handled by devices like sand filters or membranes, which serve distinct roles in the water treatment process. Each of these activities is vital for comprehensive water quality management but does not pertain directly to the primary purpose of a sump pit.