Before starting a centrifugal pump, it is important to ensure that it is what?

Before starting a centrifugal pump, ensuring that it is primed is crucial because this pump design relies heavily on the presence of liquid in its casing to create the necessary hydraulic conditions for it to function properly. Priming refers to filling the pump casing and the suction line with liquid to remove any air pockets that can inhibit the operation of the pump.

If the pump is not primed, it may lead to issues such as cavitation, which can cause significant damage to the impeller and other internal components. Additionally, running a centrifugal pump that is not properly primed could result in a lack of flow, leading to overheating and eventual failure of the pump.

While being connected to the water source, fully assembled, and inspected for leaks are all important aspects of preparation and maintenance, none are as critical to the immediate function of the pump as ensuring it is primed. Being primed directly affects the pump's ability to generate suction and move fluid effectively, which is why this step is essential before operation.