Priming a submersible bore pump generally isn't necessary since they are designed to be submerged in water, which naturally primes them. However, if the pump has been removed or isn't pumping correctly, the following steps can help:
Steps to Prime a Submersible Bore Pump (When Necessary)
While submersible bore pumps are designed to operate while submerged and are therefore self-priming to a large extent, situations may arise where you need to assist the priming process. Here's how:
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Ensure Pump is Submerged: Verify the pump is fully submerged in the water. This is the most crucial step. Submersible pumps rely on the surrounding water to function correctly.
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Power Off the Pump: Before attempting any priming procedure, disconnect the power supply to the pump. This prevents any electrical hazards.
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Check for Leaks: Inspect the pipes and connections for any leaks. Air entering the system can prevent proper priming. Tighten any loose connections.
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Bleed Air from the System (If Possible): Some installations may have a bleed valve near the pump or along the pipe run. Open this valve to allow trapped air to escape. Close it once water starts flowing steadily. If no bleed valve exists, you may need to loosen a fitting at the top of the pipe to let air escape. Be prepared for water to spurt out!
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Allow Time for Water to Saturate the Pump: After ensuring the pump is submerged and bleeding any air, allow sufficient time for the pump housing to fill completely with water. This may take several minutes.
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Power On the Pump and Monitor: Reconnect the power supply and turn on the pump. Observe the water flow. It may take a few minutes for the pump to start delivering a steady stream of water.
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Troubleshooting: If the pump fails to prime after these steps:
- Check the Foot Valve (if applicable): Some systems use a foot valve at the bottom of the suction pipe to prevent water from flowing back into the well. Ensure this valve is functioning correctly and not blocked.
- Inspect the Impeller: A damaged or clogged impeller can prevent the pump from priming. If accessible, inspect and clean the impeller. This may require professional assistance.
- Check the Well Water Level: Ensure that the water level in the bore is above the pump intake. If the water level is too low, the pump will not be able to draw water.
- Professional Assistance: If you've tried these steps and the pump still doesn't prime, consult a qualified well pump technician. There may be a more significant issue requiring professional diagnosis and repair.
Important Considerations:
- Submersible pumps are generally designed to be self-priming when submerged. If you are consistently having to prime your pump, there is likely an underlying issue that needs to be addressed.
- Safety First: Always disconnect the power supply before working on any electrical equipment.
By following these steps, you can effectively prime your submersible bore pump and ensure it functions correctly.
