Best Way to Keep Your Pool Working this Summer!

What is a Swimming Pool Pump & how does it work?

Swimming pool pumps are the key component of any pool filtration system. Centrifugal pumps, technically known as pool pumps, operate on the principles of centrifugal force – water moving away from its centre. Water circulation is supplied via both an inlet and an outlet for pool pumps.

The Submersible Pump’s motor shaft drives the impeller, which rotates the volute. This results in a large amount of water rushing through. An area of negative pressure, or vacuum, is generated as the water approaches the outside edge of the impeller. Air must be exhausted from the system for a vacuum. The volute changes velocity as it creates energy. This action causes the water to flow through the filtration system plumbing.

What if the pump isn’t performing at full capacity? We recommend inspecting the O-rings and mechanical pump seal. These parts can disintegrate over time, causing air to leak and lowering the vacuum. A pool’s submersible pump motor can also go bad after years of wear and tear. Luckily, replacing a motor is more affordable than purchasing a new swimming pool pump.

Important Technical Parts of a pool pump:


As the essential component of a pool pump, the impeller is extremely important. It’s the only moving component in a pump. The impeller drives water at a terrific speed. Older pool pumps employed semi-open-face impellers. These are quite ineffective and have poor flow characteristics compared to energy-efficient pumps with closed-face impellers.

3 Types of Impellers:

  • Open Face Impellers are used for trash and sewage pumps.
  • Semi-Open Face Impellers are used in older pool pumps.
  • Closed Face Impellers are the most energy-efficient and easiest for lifting and priming.

Pump Basket

The pump basket collects debris to protect the impeller from clogs and damage.

Pump Housing / Strainer

The strainer cover O-ring seals the strainer cover from air entry into the pump housing. All air must be vented away for a swimming pool pump to prime. By a pump, priming implies reinstating water flow after being disrupted by a leak or other cause. The pump/housing/filter is filled with water when the pump is switched on. The impeller drives water over the edge and removes air in this process. As a result, suction is generated.

Pump Seal

The swimming pool pump seal is also known as a mechanical seal. A watertight seal kept the pump from leaking. Water was prevented from leaking out of a centrifugal pump’s motor shaft by employing a ceramic and graphite device. The seal is spring-loaded and cooled by water. It’s critical to remember that the pump seal should never be lubricated or allowed to dry up. Replacement parts for pool pumps include pump seals and strainer covers with O-rings.

Details regarding the pump motor?

The impeller is connected to the motor’s shaft. The shaft spins, which in turn, rotates the impeller. The water drawn into the pump body is quickened before being discharged through the return line. Bells are sometimes known as Cover Plates or End Shields. End Bells are used to support the bearings and cover wingdings. The purpose of the bearing is to allow the motor shaft to spin freely. It is enclosed in a sleeve (bearing shield) to maintain the bearing clean and spinning free.

Leaks in the pump will corrode the bearings over time. Damaged bearings might decrease flow rate, overheating, or cause electrical damage. The Rotor and Stator Winding generate an alternating electrical current that turns the motor shaft by winding the rotor and stator windings together.


The swimming pool pump is a great investment if you own a commercial pool; various options offer warranties outlasting many years. A swimming pool’s submersible pump motor can go bad after years of wear and tear. Luckily, replacing a motor is more affordable than purchasing a new swimming pool pump.

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