What would the required impeller diameter be if needed in the system?

When determining the required impeller diameter in a system, several factors need to be considered, including the flow rate, head requirement, pump type, and specific system parameters. An impeller's diameter significantly affects the pump's performance characteristics, including the flow rate and head produced.

In this scenario, the answer indicates that 10 5/8" is the correct diameter for the impeller required for the system. This choice reflects the necessary diameter to ensure that the pump operates efficiently at the desired performance levels. Specifically, a larger impeller diameter can increase the flow and head, meeting the system's demands.

In contrast, smaller diameters may not provide sufficient performance for the system's requirements. If the diameter were set too small, the pump may struggle to deliver adequate flow or head, resulting in inefficiencies and potential operational issues. Hence, the 10 5/8" diameter is optimal, aligning with the engineering calculations and performance characteristics required for this specific application.