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The pumping rate is dependent on a number of factors including:-
The depth of liquid in the well.
Liquid recharge rate in the well, i.e. if the well recharges at a rate of 100 litres/hour, the pump is limited to discharging at 100litres/hour.
The system air pressure.
The system pressure differential i.e. the difference between the actual system air pressure and the losses incurred due to total static head plus frictional loss.
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