The first method is the most simple way: 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 the pump automatically and quickly start. This type of water absorption requires a perfect automatic control system to ensure normal work.

The second methods are relatively simple relative to the following: the self - suction pump reduces the bend, drop height and horizontal interval of the inlet pipe.

The third method is a little troublesome, but it is also very good: self suction pump set up the pump before the suction tank. This way is needed in a suction tank set the pump suction pipe, water pump in the first operation, artificial internal tank filled with water, the first run to stop, because the water inlet pipe is higher than the height of the water tank inside the tube height of the water tank, despite the height of the water tank is lower than the water level, water tank can't go back, into the pool, so the water absorption can be stored, and because water tank outlet pipe (i.e. pump suction pipe) tube height is lower than the height of the water, so it can ensure the pump suction pipe is full of water, and then after the pump is running, the water tank is pumped away in the tank on the negative pressure, the water in the pool under the action of atmospheric pressure added to the water tank through the suction tank inside the pool.

Finally, a way of absorbing water from the suction end of the valve is installed at the end of the sewage pump tube. Suction end of the valve is actually a check valve, it can only guarantee the flow by the pool into the suction tube can not turn the clock back, so if the water pipe is full of water, despite the elevation axis pump the water level above the pool, but because the suction end of the valve function, the suction tube into the pool water will not enable the suction tube has been filled with water to ensure the pump can automatically and quickly start.

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