What does 'Lift' describe in relation to pumps in water systems?

The term 'Lift' in relation to pumps in water systems specifically refers to the vertical distance from the water level to the pump inlet. This is an essential measurement because it affects the pump's ability to draw water from a source. The lift must be taken into account when selecting a pump, as a greater lift requires a pump that can provide sufficient suction to overcome gravity and effectively draw water.

Understanding lift is crucial for operators because if the lift is too high for a given pump, it may not be able to function properly, leading to inadequate flow rates or potential damage to the pump itself. This concept plays a vital role in the overall efficiency and performance of water systems. In contrast, the other options describe different aspects related to the performance and operation of pumps or tanks but do not accurately define what 'Lift' specifically means in this context.