Massachusetts Wastewater Practice Exam

Throttling a pump using the suction valve is not recommended because it can lead to several issues that compromise the efficiency and functionality of the pump system. Throttling essentially restricts the flow of liquid entering the pump, which can lead to vaporization, cavitation, and overheating. These conditions not only decrease the pump's performance but can also cause damage to the pump components over time.

Instead, flow control should be achieved using valves on the discharge side of the pump. This ensures that the pump operates within its optimum range, maintaining a consistent flow and pressure while avoiding potential damage from improper operations.

Using the suction valve to manage flow is a practice that can have serious consequences and is not considered standard procedure in the management of pump systems. Therefore, the recommendation aligned with best practices is to avoid throttling the pump through the suction valve.