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Dec . 13, 2024 16:48 Back to list

do you have to prime a submersible pump

Do You Have to Prime a Submersible Pump?


When it comes to pumping water from a deep well or a sump, submersible pumps have become a popular choice due to their efficiency and ability to operate underwater. However, one of the common questions that arise when discussing submersible pumps is whether they need to be primed before use. To answer this question, we need to look at how submersible pumps operate and the difference between priming and non-priming pumps.


Understanding Submersible Pumps


Submersible pumps are designed to be submerged in the liquid they are intended to pump. These pumps are hermetically sealed, meaning their motor and other functioning parts are inside a casing that prevents water from entering. This design allows the pump to push water to the surface effectively. Unlike traditional centrifugal pumps that are installed above the water source, submersible pumps do not rely on atmospheric pressure to draw water up, which is a fundamental aspect of their operation.


Priming What Is It?


Priming is the process of filling a pump with liquid (usually water) to eliminate air pockets in the pump and its piping before it starts pumping. This is crucial for many types of pumps, particularly those that are above the water source, such as jet pumps and some centrifugal pumps. If air remains in the pump system, it can prevent proper operation, causing the pump to cavitate, which can lead to significant damage over time.


Do Submersible Pumps Need Priming?


The short answer is no; submersible pumps do not require priming in the traditional sense. Because they are submerged in water, they are already surrounded by the liquid they need to pump. When powered on, these pumps can create suction from below, allowing them to begin operations immediately without the need for manual priming.


do you have to prime a submersible pump

do you have to prime a submersible pump

However, there are a few considerations to keep in mind

1. Initial Setup While submersible pumps do not need to be primed, it is essential to ensure that the pump is correctly positioned in the water source. Improper placement can lead to air exposure, especially if the water level is low.


2. Lifting Water from a Depth If a submersible pump is used in a well, the water level must be sufficient for the pump to function correctly. If the water level drops below the pump intake, it can lead to dry running or cavitation, which could harm the pump.


3. Air Lock Issues On rare occasions, if a submersible pump is installed incorrectly or has been dislodged, it may trap air within the system. Although this is not typical, if you notice that the pump isn't working after installation, it is a good idea to inspect for any air locks that may need resolving.


4. Self-Priming Behavior Some submersible pumps can handle minor air issues without significant operational interruption thanks to their design. They can self-prime to some extent as they start, which is a considerable advantage.


Conclusion


In conclusion, submersible pumps do not require priming like other pumps that sit above the water level. Their design allows them to operate efficiently underwater, making them an excellent choice for various applications, including residential sump pumping and agricultural irrigation. Just remember to verify the correct installation and ensure that the water level is appropriate for optimal operation. With the right setup, a submersible pump can provide years of reliable service without the issues associated with priming necessary for other pump types.




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