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Common Issues and Solutions 1. Air leakage in the suction pipeline: It is recommended to eliminate such air leakage. Within the allowable suction range, if water does not start to be drawn in after the self-priming pump has been running for 4–5 minutes, place your ear against the inlet pipe at the suspected location of leakage to listen for any sucking sound. Alternatively, repair the area by applying white latex or similar methods. 2. No liquid is stored in the self-priming pump or the storage volume is not full: It is recommended to fill it with sufficient liquid. 3. Excessively high suction lift or too long suction pipeline: It is recommended to reduce the suction lift or shorten the pipeline. 4. Low voltage: It is recommended to adjust the voltage. 5. The suction pump body or the filter screen in the inlet pipeline is blocked by debris and stones: It is recommended to check and remove the blockages. 6. Excessive leakage from the mechanical seal: It is recommended to repair or replace it. 7. Damaged or worn impeller: It is recommended to replace it with a new one. 8. Incorrect installation of the outlet piping with too many elbows: There are too many pipes arranged in an N-shaped pattern; it is recommended to install an automatic vent valve at the highest point. 9. Reverse wiring of the three-phase motor: Please swap two of the phases. 10. Blockage in the backflow hole of the self-priming pump prevents separation of vapor from water; it is recommended to check and clean it out.