Centrifugal versus self-priming filtration pump

Centrifugal or self-priming swimming pool filtration pump: which one to choose?

The filtration pump draws water from the pool, directs it to the filter then returns it to the pool. Its role is crucial. Many features differentiate this equipment. The term "centrifugal pump" or "self-priming" is one of these distinctions. What is a centrifugal pump? What is a self-priming pump? What are their characteristics and differences? Which one to choose? These are the questions to ask yourself to know how to choose the swimming pool filtration pump that best suits your installation.

The centrifugal swimming pool filtration pump

The centrifugal filtration pump is a device that uses the centrifugal effect to circulate water and increase pressure.

  • Simple and low-tech in design, it is less expensive than self-priming pumps.
  • The rotational energy is directly induced by the motor conversion. As a result, the pump is a device of great mechanical simplicity, particularly robust, low noise and reliable and regular operation.
  • It is more compatible with the use of water loaded with solid particles. It can be recommended when dense vegetation surrounds the environment close to the swimming pool.
  • Small in size, the centrifugal pump fits easily into small technical rooms, such as an underground room or a filtration block for example.
  • The flow rate is lower than that of a self-priming pump. It is rather intended for small volume swimming pools.

The self-priming swimming pool filtration pump

The self-priming pump is equipped with a mechanical water inlet detection system. As soon as the pre-filter is filled with water, the pool pump starts automatically. That said, when putting the pool into service, you must manually fill the pump pre-filter at least once. Then, each time the filtration time is programmed, the pump turns on by itself and starts.

Ideally the filtration pump is installed below the level of the pool water line. By gravity, the pump is continuously under load.

  • It has a higher flow rate than centrifugal pumps and adapts to all water volumes.
  • It is more imposing in size, and is more likely to be installed in a “classic” technical room.
  • Particularly resistant, the self-priming filtration pump can be used intensively. Ideal in particular for pools that operate all year round or for pools installed in hot regions where filtration must operate over long periods or even 24 hours a day.

The self-priming pump for swimming pools is becoming more and more widespread and popular; it becomes the reference and dethrones the so-called “classic” centrifugal pump. It is a preferred choice, efficient and comfortable.

To correctly choose the swimming pool filtration pump best suited to your installation, it is essential to know what flow rate for the swimming pool filtration pump and what power for the swimming pool filtration pump must be taken into account. Different types of swimming pool filtration pumps exist. To help you in your choice, let's analyze the differences between single speed filtration pump versus variable speed pump.

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