What component of a circulation pump collects water and creates pressure as flow velocity increases?

The volute is the correct answer because it plays a crucial role in the operation of a circulation pump. As the impeller spins, it rapidly pushes water outward due to centrifugal force. The volute is designed as a spiraled casing that surrounds the impeller and collects the water being discharged. As water enters the volute, its velocity decreases, and due to the design of the volute, the kinetic energy of the moving water is converted into pressure energy. This process leads to an increase in pressure as the water flows through the larger cross-section of the volute, which is essential for effectively moving water through the pool circulation system.

Understanding the function of the volute is fundamental for anyone working with commercial pool systems, as it directly affects the flow and pressure of water distribution necessary for maintaining water quality and circulation in pools.