Below is a brief explanation of the reasons why a self-priming pump cannot draw water.

　　Reasons why a self-priming pump cannot draw water.

　　During the use of various self-priming pumps, some users often encounter the phenomenon that the self-priming pump is not filled with water. They don't know why the self-priming pump cannot pump water, but they don't know why the self-priming pump cannot pump water. In order to prevent the user's self-priming pump from not being filled with water, the reasons why the self-priming pump is not filled with water are shared:

　　1. Generally, self-priming pump products need to be filled with liquid before use. Some users do not add water, or the water is too little, which may be the reason why the self-priming pump cannot draw water. Therefore, the liquid must be filled before starting the pump.

　　2. Suction pipe leakage: Eliminate pipeline leakage. Check method: If the pump is not sucked up within 4-5 minutes within the allowable suction range, please place your ear near the suspected leakage point of the intake pipe to listen for the sound of air inhalation, or check the method: If the pump is not sucked up within 4-5 minutes within the suction range, please place your ear near the suspected leakage point of the intake pipe.

　　3. Low voltage does not reach the effective voltage, causing the self-priming pump to malfunction. Adjust the voltage.

　　4. Excessive suction or excessively long suction pipe: Reduce suction or shorten the pipe, and replace a self-priming pump with greater suction, such as a high-suction self-priming pump.

　　5. Mechanical seal leakage will also cause the self-priming pump to be unable to draw water, because the mechanical seal leakage will also affect the self-priming ability of the self-priming pump. In this case, it needs to be replaced.

　　6. The filter in the pump body or the inlet pipe is blocked by stones and debris: Check and clear the blockage.

　　7. Impeller damage or wear: Replace the new impeller.

　　8. Too many incorrectly installed elbows in the outlet pipe: Too many pipes, it is recommended to install the automatic drain valve at the highest point.

　　9. Three-phase motor reverse connection: Swap two phases.

　　10. The self-priming pump reflux hole is blocked, causing the water vapor to be unable to separate: Check and clean.

　　11. During the installation process, due to site environment and other reasons, there are too many elbows in the water intake pipe, which will also cause the self-priming pump to draw water. It is recommended that the number of elbows at the self-priming pump inlet be controlled within 1-2, and controlled within 3 elbows. Too many elbows will cause losses to the self-priming pump.

　　12. Due to the excessive specific gravity of the self-priming liquid, the self-priming pump cannot draw water. Therefore, the effective self-priming height of the self-priming pump should be calculated by dividing the theoretical self-priming height of the self-priming pump by the specific gravity of the medium, which is the actual self-priming height.

　　The reasons why a self-priming pump generally does not draw water are the above reasons. If the problem of the self-priming pump not drawing water has not been solved for you, you can consult the self-priming pump experts of Yu Bo Company, and we will explain more reasons why the self-priming pump does not draw water.

　　Okay, that's all for the explanation from the editor. Thank you for watching, and see you next time.