First method(simplest one) Self-priming sewage pump vacuum pump is arranged in the water pipeline, water pump start before the vacuum pump starts to pump water pipe Neixianbu with water, to ensure that the water pump, quick start. This type of water absorption requires a perfect automatic control system to ensure normal work. Second method(more simple) The self – priming pump reduces the water inlet pipe curve , the fall height and the horizontal interval. Third way( Trouble, but it works.) The self-priming pump is equipped with a water suction tank in front of the pump. In this way, a suction tank should be installed on the pump suction pipe. Before the first operation of the pump, the tank should be filled with water manually, and after the first operation the tank should be stopped. Since the intake pipe of the suction tank is higher than the water level inside the pipe,the water in the tank will not flow back into the pool, so the water can be stored in the tank, and beca...