How to deal with a self-priming pump that doesn’t draw in fluid
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There is a self-priming pump in the pool, and for some reason it sometimes pumps water and other times it doesn’t. We are the operators, and without repairing the pump, is there any way to make it pump water so as to lower the level in the pool? Thank you; looking forward to your advice
Which type of self-priming pump? The problem with the immobile pump not being able to supply water is basically air leakage in the inlet pipeline.
Connect a priming line to fill the pump before starting it, and close the priming line after it has started running.
I guess the problem lies in the inlet pipeline
Reasons why a self-priming pump fails to draw in fluid without repairing the pump, that is, when there is no fault with the pump. Are you referring to your sealless, automatically controlled self-priming pump? 1. The inlet is blocked, and the bottom valve is stuck and won’t open; clean out any debris from the inlet and service the bottom valve. 2. There is gas inside the pump that has not been removed; it is recommended to fill it with water. 3. The motor is running in reverse direction; contact the electrical technician to address this issue. 4. The error may be due to problems such as an incorrect reading on the gauge, a faulty pressure gauge, malfunctioning remote transmission systems, faulty level gauges, or valves that fail to open properly. It is recommended to check each of these elements one by one to identify and resolve the problem. 5. The pump is faulty: the impeller may be damaged due to corrosion and erosion; in such cases, the impeller needs to be replaced. If the gap between the impeller and the pump body is too large, it needs to be adjusted. If the flow channels of the impeller are blocked, they need to be cleaned. If the partition between the suction chamber and the discharge chamber is damaged, causing the two chambers to connect, it needs to be repaired by welding. Inter-stage baffles, or high circulation flow in the secondary impeller; repair the baffles by welding, or adjust the gap between the secondary impeller and the baffles, etc
The flow rate isn’t high; cavitation is occurring. I work on self-priming pumps
Your problem is most likely caused by a leak in the pump inlet check valve. Just pull it out for maintenance.
1. Check the pool level gauge periodically to ensure that it accurately displays changes in liquid level. 2. Regularly clean the base pump filter. 3. Extend the suction pipeline at the bottom of the pump to reduce the distance from the pool bottom.