The slurry pump needs to pump out the water in the pump to form a vacuum and then enter the water, so there is a process of water diversion and exhaust. There are usually two ways to inject water into the equipment: one is to directly inject water into the pump cavity (this exhaust hole should be opened to exhaust the air in the pump); The second is to pump out the gas in the pump, establish a certain degree of vacuum (close the outlet pipe gate valve at this time), and introduce the water source.