What to do when a high-efficiency, energy-saving multi-stage pump fails to draw water

Category: Water pump knowledge

2025-07-22

The high-efficiency energy-saving multi-stage pump not drawing water is a common problem. This situation may be caused by a variety of reasons. Below, we will detail the possible causes and corresponding solutions.

I. Possible Causes

1. Suction pipe problems: The pipe may have leaks, blockages, or improper installation, preventing the pump from drawing water normally.

2. Insufficient pump speed: A low pump speed may prevent it from generating sufficient suction.

3. Inlet valve not open or blocked: If the inlet valve is not open or blocked, the pump cannot draw in water.

4. Liquid temperature too high: Excessive temperature may increase the vapor pressure inside the pump, affecting the water suction effect.

5. Impeller damage or wear: Impeller damage or wear may reduce pump flow or prevent water suction.

II. Solutions

1. Check and repair pipe problems: Check if the pipe connections are tight, if there are any leaks, and clean any blockages in the pipe.

2. Check and adjust the pump speed: Ensure the pump speed meets the specified requirements. Adjust the motor speed if necessary.

3. Check and operate the valve: Ensure the inlet valve is fully open and not blocked.

4. Cooling treatment: If the liquid temperature is too high, cooling measures can be taken, such as adding a radiator.

5. Check and replace the impeller: If the impeller is damaged or severely worn, it should be replaced promptly.

6. Check other pump components: Check if components such as the foot valve and bearings are working normally. If there are any abnormalities, repair or replace them promptly.

7. Air evacuation: If it is a newly installed pump, it may be due to air not being exhausted from the pipe, causing it not to draw water. In this case, loosen the air vent screw on the pump, exhaust the air, and then tighten it.

8. Check power and voltage: Ensure the power and voltage are stable to avoid affecting the normal operation of the pump.

III. Preventive Measures

1. Regular inspection and maintenance: Regularly inspect and maintain the pump to ensure it is in good condition.

2. Correct operation: Operate the pump correctly according to the operating procedures to avoid problems caused by misoperation.

3. Environmental control: Keep the pump's working environment clean and dry, and avoid excessively high liquid temperatures.

If the above methods fail to solve the problem, it is recommended to contact a professional repairman for inspection and repair. In short, the problem of the high-efficiency energy-saving multi-stage pump not drawing water needs to be taken seriously. Take measures to solve it promptly to ensure the normal operation and service life of the pump.

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