What component gives a pool pump the ability to handle air and re-prime itself?

The ability of a pool pump to handle air and re-prime itself is primarily attributed to the volute component. The volute is a chamber that directs the flow of water pumped by the impeller and is designed to maintain pressure within the system. When a pump is initially primed, it needs to be filled with water for efficient operation. If air enters the pump, it can disrupt this process.

The volute plays a crucial role in creating a pathway for the water and air to be expelled, allowing the pump to rapidly recover if it experiences an air lock or cavitation. This makes the re-priming process possible, ensuring the pool system can maintain its water circulation effectively.

In contrast, while the impeller is essential for moving water through the system, it does not have the capacity to manage air and assist with re-priming on its own. The motor provides the energy needed to turn the impeller but does not directly influence the management of air. The strainer helps in filtering debris and preventing large particles from entering the pump, but it does not contribute to the re-priming capability. Therefore, the volute is the key component that enables the pool pump to handle air and self-prime efficiently.