Which of the following factors is NOT typically considered when selecting a pump?

When selecting a pump, certain critical factors must be taken into account to ensure that the pump will operate efficiently and effectively for the intended application. Flow rates required are fundamental because they help determine the size and capacity of the pump needed to meet the system demands. The type of fluid being pumped significantly impacts the choice of pump as different fluids can require different materials and designs to handle their viscosity, corrosiveness, and other properties. The suction head available is also crucial, as it influences the pump's ability to draw fluid into the system and ensures that the pump can maintain its required operation under various conditions.

In contrast, the manufacturer of previous pumps does not usually factor into the selection process of a new pump. While past experience with a specific manufacturer may be valuable in terms of reliability or service, it does not directly impact the operational requirements of the new pump installation. Consequently, the choice of manufacturer is less critical compared to the other essential factors mentioned.