Booster pumps increase water pressure as a way to increase flow. A booster pump works like a fan with blades that rotate to increase air flow, and a booster pump has an impeller inside that increases water flow and pressure in the same way.

Most of them are centrifugal pumps that take water from a water source and move it through an impeller (single-stage) or multiple impellers (multi-stage) to increase the water pressure. The high-pressure water then flows through the outlet.