How to fix a self-priming pump that doesn’t draw water
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The newly installed self-priming pump has difficulty starting to draw water; it requires multiple attempts at filling it with water before it can operate. I wonder if any friends have good suggestions.
Search the forum topics; there are many posts related to self-priming pumps. Check whether there are any leaks in the water inlet pipeline.
Is there a leak in the one-way valve of the water storage tank?
There’s a leak; there must be some leakage somewhere in the pipeline. It’s usually a leakage issue. Of course, there’s also the self-priming pump type, which has many holes on the back side of the impeller for cooling the seal. If that’s the case, then it’s necessary to check whether the seal is leaking
There might be a leak at the inlet, or a leak in the pump
If there’s nothing wrong with the equipment itself, there might be leaks in the process pipelines; try performing a positive pressure leak test
To check for leaks in the inlet pipeline, a check valve can be installed at the bottom of the pipeline to facilitate pumping in the future.
If a self-priming pump fails to draw liquid, check for air leaks in the pipes and at the inlet and outlet
The manufacturing process and components of self-priming pumps are currently quite rough; therefore, when installing them, it is essential to pay close attention to detailed inspections and thorough disassembly checks. All those that are unreliable need to be verified and rectified. This type of phenomenon is the issue of check valve leakage. Newly acquired equipment is not necessarily in good condition; it may have issues such as rust or worn-out gaskets. It’s essential to conduct a thorough inspection to avoid future problems.