What is the repair method for a self-priming pump that keeps running without stopping?

[StLilliana]

Self-priming pump that keeps running without stopping repair method is: promptly check whether there is water leakage in the outlet pipe, locate the leakage position, repair or replace it to ensure normal operation. The working principle of the self-priming pump is: before starting the pump, fill the pump casing with water first. After starting, the high-speed rotation of the impeller causes the water in the impeller channel to flow toward the volute, creating a vacuum at the inlet, which opens the inlet check valve, allowing air in the suction pipe to enter the pump and reach the outer edge through the impeller channel. Precautions for using a self-priming pump include: 1. After the entire pump body is fixed, steel pipes can be used to connect to the pump's inlet, and the bottom valve of the self-priming pump needs to be perpendicular to the horizontal plane to ensure normal use later; 2. To prevent electric shock accidents, necessary protective measures should be taken.

[LeIris]

Recently, I encountered a similar issue with my garden water pump system. There could be multiple reasons why a self-priming pump won’t shut off, such as the water level being too low for the pump to draw water, a stuck pressure switch, air leaks in the pipes, or a valve not being tightly closed. When troubleshooting, first confirm that the pump’s inlet has enough water—if the water level is insufficient, add more. Next, check if the pressure switch is clogged with dust, preventing it from sensing pressure changes; sometimes a simple cleaning can fix the issue. If that doesn’t work, manually press the switch to see if it responds. If the pump still runs, inspect the pipe connections for looseness or air leaks and tighten them as needed. This task isn’t difficult and can be handled by those with decent DIY skills, but remember to disconnect the power to avoid electric shock. After repairs, test the system for a few minutes to observe if it shuts off automatically. If the problem persists, consider replacing the switch or seeking professional repair. For routine maintenance, regularly check the system’s sealing to prevent blockages and extend the pump’s lifespan.

[AdalynnLee]

I've been maintaining agricultural equipment for a long time. Continuous operation of self-priming pumps usually indicates system issues. The simple repair method involves step-by-step troubleshooting: First, check if the water source is sufficient - if the water level is too low, the pump will keep drawing water, and simply replenishing it will solve the problem. Second, inspect whether the pressure controller has failed, often due to dust or water ingress causing sticking - adjust the sensitivity with a screwdriver or clean the contacts. Third, check for pipeline leaks, especially loose connections causing air leaks, which require resealing. Additionally, if the valve is worn out from prolonged use, it might cause this issue too - just replace it with a new one. For safety, always disconnect power before repairs and test system recovery afterward. Developing a habit of monthly pump head cleaning and pipeline inspection can prevent 90% of downtime issues, saving money and effort while avoiding motor burnout. For complex problems, don't struggle alone - seeking professional help is both efficient and reassuring.

[KendraLee]

The self-priming pump not shutting off is quite straightforward to repair, I've handled it several times. First, check if the liquid level is sufficient—if low, add water. Inspect the pressure switch for proper function; if stuck, clean and reset it. Then, examine the pipes for air leaks, tightening connections or applying sealant as needed. Valve malfunctions can also cause this issue, which can be resolved by replacement. Always disconnect power before repairs for safety, and observe the automatic shutoff effect after testing the fix. For maintenance, cleaning the pump body to prevent clogging is recommended.