A submersible water pump is an essential piece of equipment used in construction, industrial, and emergency applications for effective dewatering and fluid transfer. However, ensuring the pump is primed adequately before operation is crucial for efficiency and longevity.
At John F Hunt Pumping Solutions, we provide expert guidance on maintaining and operating your pumps for optimal performance.
In this guide, we’ll walk you through the step-by-step process of priming a submersible water pump.
Why Priming a Submersible Pump Is Important
Unlike traditional centrifugal pumps, submersible water pumps are designed to be self-priming because they operate while fully submerged. However, ensuring proper priming before starting the pump can prevent common issues such as:
- Airlocks that reduce pump efficiency
- Dry running, which can cause motor damage
- Cavitation, leading to performance deterioration
Step-by-Step Guide to Priming a Submersible Water Pump
Follow these key steps to prime your submersible water pump properly:
Check that the power is off!
Inspect the Pump and Installation
Before priming, conduct a thorough inspection:
- Ensure the pump is fully submerged in the liquid to avoid air pockets.
- Check for blockages in the intake screen or pipework.
- Inspect electrical connections to confirm proper power supply.
Fill the Pump with Water
Some submersible pumps require pre-filling to eliminate trapped air. If necessary:
- Remove the priming plug (if applicable) and fill the chamber with clean water.
- Allow water to settle inside the pump before reinserting the plug.
Check the Discharge Hose/Pipe
- Ensure the discharge line is properly connected and free of kinks or obstructions.
- If using a check valve, make sure it is functioning correctly to prevent backflow.
Start the Pump
- Power on the pump and allow it to run.
- Is water flowing smoothly through the discharge pipe?
- If the pump is labouring, turn it off immediately and re-check for airlocks or blockages.
- Turn it on again.
Monitor Performance
Once running:
- Check the flow rate.
- Listen for any unusual noises, vibrations, or overheating.
- Ensure the water level remains sufficient to ensure the pump is fully submerged.
Troubleshooting Common Priming Issues
If your pump does not prime properly:
- Possible Airlock: Tilt or shake the pump slightly underwater to release trapped air.
- Low Water Level: Is the water covering the pump?
- Blocked Intake: Clean the intake screen.
- Faulty Check Valve: Inspect and replace if necessary.
Conclusion
Ensuring your submersible water pump is properly primed is key to maintaining efficiency and prolonging its lifespan. By following these simple steps, you can prevent operational issues and optimise performance. At John F Hunt Pumping Solutions, we specialise in providing high-quality pump hire, sales, and servicing solutions for various industries.
For expert advice or to find the right pump for your needs, contact our team today at 01515599555 or search our pumping services.