ABSTRACT
A pump is installed to move water when existing pressure is inadequate. If a pump system is to provide pressure to move water, obviously the pump must be on. Suction and discharge heads are not static. They are dynamic heads, and they will depend upon the length and condition of the system. Due to friction head loss, suction and discharge heads will decrease with pipe length. The actual work the pump must do in lifting water to the higher tank is greater than that designated by the static heads. Water pumped from a tank by a pump set above the water surface exhibits the same phenomena as the groundwater well, except that static and pumping water levels are not separate because there is no soil structure to create drawdown. Level control devices govern pump operation, and pumping rate can be checked by running a pumping test.
