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Submersible pumps have several kinds, motor with OC as a line type and water-type there is dry you must first read the instruction before using, can't get it wrong, without long-term, you must still have to get the impeller turn before using, or you'll burn bag because of the long time jamming. Prior to starting the pump, suction line and pump must be filled with liquid. After starting the pump, the impeller spinning at liquid rotating along with the blade, under the action of centrifugal force, departed the impeller out shoot out, fire a spread of liquid in pump casing Interior speed slows, pressure builds, and then from the pump outlet, outlet pipe outflow. At this point, the liquid leaves the Center formed around being jilt neither air nor liquid vacuum and low pressure areas, liquid pool of liquid surface under the influence of atmospheric pressure, suction pipe into pump, liquid is continuously from a pool of liquid being pumped continuously flows from the discharge pipe.