1.You needn't build pump station just put the pumjp into the water,turn on the switch and the it can inhale water itself and won't be ; influenced by the rain or water.it is ligh in weight and can be moved away easily. 2.It changes absorption lift into pressure lift,the intake of the different qualification offloationg pumps will always be in 25-50cm below the water level.So it is in a suitable position to inhale water.It shorts the pipe and it doesn't need bottom valve,so it can save 10-30 percent of electricity. 3.The seal of axle won't be influenced by sand in the bottom of river and it won't sink in the sands.4.Available for oxygenation in deep water. 4.One Machine with several purposes