• The static head is the actual difference in the elevations.
• The kinetic and velocity heads are the same which exits because of the kinetic energy of the water in the pump because of the flow.
• The total manometric head is the difference in pressure (in meters) between the pump’s inlet and outlet points.
• This value is always higher than the actual difference in elevation between these two points; when pumping is going on, the pump needs also to overcome friction losses occurring as the water flows through the intake and outlet pipes.

Thus, the pump will only deliver the water if the pressure rise in the impeller is equal to or more than the manometric head.