What's wrong with the fish tank water pump not pumping and draining water

Mar 01,2025

The problem of the fish tank water pump not pumping or draining water may be caused by various factors. The following are some common reasons and corresponding solutions: Common reasons

1. The interior or inlet pipe of the water pump contains air: the self-priming pump was not filled with water before starting. The water pump is above the water surface, causing it to only suck in air. The connection between the pump body and the inlet pipe has a high downward slope, or the pump has been worn out or the packing is too loose due to its age, resulting in air entering.

2. Low pump speed: Motor failure or damage causing a decrease in pump speed. Improper installation or motor configuration can affect the speed of the water pump.

3. Excessive suction stroke of the water pump: The maximum suction stroke of the water pump is ignored, resulting in the water pump being unable to suck up water after operation.

4. Pump blockage: The inlet is blocked by debris, scale, etc. The accumulation of dirt inside the water pump affects its normal operation.

5. Power failure: The root of the plug is broken or the power cord is disconnected. The stator coil is broken, causing the water pump to malfunction.

6. Other factors: The impeller of the water pump is stuck by foreign objects. The variable frequency submersible pump automatically stops due to low water level. After the bottom filter fish tank filter box runs out of water, the water pump automatically stops. solution

1. Exclude air: Ensure that the water pump is completely immersed in water and avoid inhaling air. Check and adjust the connection between the pump body and the inlet pipe to ensure good sealing.

2. Increase the speed of the water pump: Check if the motor is faulty, replace or repair it in a timely manner. Ensure that the water pump is installed correctly and the motor is configured appropriately.

3. Adjust the suction stroke of the water pump: Based on the water source and surrounding terrain, adjust the position of the water pump reasonably to avoid excessive suction stroke.

4. Cleaning water pump: Regularly clean the inlet to prevent blockage by debris. Disassemble the water pump, clean the internal dirt, and use specialized cleaning agents if necessary.

5. Check the power supply: Confirm if the plug is properly plugged in and if the power cord is intact. Check whether the stator coil is broken, replace or repair it in a timely manner.

6. Other maintenance measures: Clean foreign objects on the impeller of the water pump to ensure its normal operation. For variable frequency submersible pumps, it is necessary to ensure that the water level is within the specified range and avoid automatic stopping. For bottom filter fish tanks, it is necessary to regularly check the water level in the filter box and replenish water in a timely manner.

By using the above methods, the problem of the fish tank water pump not pumping or draining can be effectively solved. In daily use, it is also necessary to pay attention to keeping the equipment clean and regularly maintaining it to extend its service life.