What is a common effect of a blockage in the discharge line of a pump?

A blockage in the discharge line of a pump can lead to a reduced efficiency of the pump. When there is an obstruction, the pump is unable to move water effectively, which means it has to work harder to try to overcome the resistance caused by the blockage. As a result, the energy consumed by the pump does not translate as effectively into moving fluid, leading to inefficiencies in its operation.

This inefficiency can cause several issues, including increased wear and tear on the pump and potential overheating. In contrast, options that include an increased flow rate or decreased amperage draw would not occur since the blockage would disrupt the normal flow and require more energy to attempt to push fluid through the obstruction. Similarly, while there may be higher pressure in the pump due to the blockage, the focus here is on the overall efficiency of the pump in performing its intended function.