Reasons why the water pump can't pump water

The reason is that there is air in the pump body or gas accumulation in the inlet pipe, or the bottom valve is not tightly closed, the filling water is not enough, the vacuum pump packing is seriously leaking, and the gate valve or flap is not tightly closed. Troubleshooting: first increase the water pressure, then fill the pump body with water, and then start it. At the same time, check whether the check valve is tight and whether the pipeline and joint have air leakage. If air leakage is found, apply lubricating oil or blending paint on the joint after disassembly and tighten the screw. Check the oil seal ring of the water pump shaft, and replace it with a new one if it is seriously worn. The pipeline leaks water or air. The nut may not be tightened tightly during installation. If the leakage is not serious, cement can be applied to the place with air or water leakage, or cement slurry mixed with asphalt oil can be applied. For temporary repair, apply some wet mud or soft soap. If there is water leakage at the joint, the nut can be tightened with a wrench. If the water leakage is serious, it must be disassembled again and the cracked pipe replaced; Lower the lift and press the nozzle of the water pump into the water for 0.5m.