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25 feet artesian automatic break-down catchment area centrifugal pump running cost country houses crank cylinder barrel deep-well delivery head delivery line delivery pipes delivery valve diameter displacer domestic double-acting drive drum efficiency electric motor farm fitted foot-valve fugal gallons per hour gear gear pump gravity tank system ground-level Head in feet High lifts high speed high-speed piston pump inch increased inlet inside installation liquid makers maximum method modern mounted oil-bath paracyclic plain bearing Plate plunger pump power head power pipe power pumping pressure tank system priming funnel pulleys pump chamber rain-water rate of delivery rate of draw-off repriming rising main rotary pump rotation rotor septic tank service pipe shaft shallow shallow-well pump simple centrifugal pump small centrifugal pump storage stroke suction lift suction pipe suction valve sufficient suitable switch taps total head trouble type of pump unit usually vertical water service water supply