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25 feet artesian automatic break-down catchment area centrifugal pump running CHAIN PUMP cost country houses crank cylinder barrel deep-well delivery head delivery line delivery pipes delivery valve device diameter displacer domestic double-acting drive drum efficiency electric motor fitted foot-valve 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 Ioo feet James Beresford liquid makers maximum method modern mounted oil-bath 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 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 type of pump unit usually vertical water service