What type of pump is used to maintain water pressure during usage?

The city water booster pump is specifically designed to maintain water pressure in a system when there is a demand for water. These pumps are typically employed in scenarios where the existing water pressure from the municipal supply is insufficient for operational needs, such as in large buildings or industrial applications.

When water is being used, especially in large volumes or at high elevations, the pressure can drop significantly. The booster pump addresses this issue by increasing the pressure of the water before it is distributed through the plumbing system. This ensures a consistent flow of water with adequate pressure for various applications, ranging from faucets to sprinkler systems.

The other options serve different functions: chemical feed pumps are used for dosing chemicals into water systems, backflow preventers are designed to prevent the reverse flow of water that could contaminate the water supply, and captive air tanks are used to store pressurized water and maintain consistent pressure but do not actively boost water pressure. Hence, the city water booster pump is the most suitable choice for maintaining adequate water pressure during usage.