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what is a pool pump impeller


Author: Poolking - Swimming Pool Equipment Manufacturer

What is a Pool Pump Impeller?

A pool pump impeller is a crucial component of a swimming pool filtration system that plays a significant role in ensuring the water in the pool stays clean and safe for swimmers. The impeller sits inside the pump housing and rotates at high speeds, forcing water through the filtration system to remove debris and contaminants. Understanding how a pool pump impeller works is essential for proper maintenance and repair of your swimming pool filter system.

How Does a Pool Pump Impeller Work?

The impeller is a disc-shaped component with an array of vanes or blades that extend from its central hub. As the motor spins, the impeller rotates at high speeds, generating centrifugal force that propels water through the filtration system. The impeller vanes create a low-pressure area at the center of the disc and a high-pressure area at the edges, driving water through the inlet, into the impeller, and out through the discharge port, where it flows through the rest of the filtration system.

Types of Pool Pump Impellers

Pool pump impellers come in various designs, including closed and open-faced impellers. In a closed impeller, the blades are fully enclosed within the impeller housing, while in an open-faced impeller, the vanes are exposed. Closed impellers are typically more efficient and better suited for high-pressure applications, while open-faced impellers are better for low-pressure systems.

Impeller Materials

Pool pump impellers are made from various materials, including plastic, bronze, and stainless steel. Plastic impellers are lightweight and inexpensive but have a shorter lifespan than other materials. Bronze and stainless steel impellers are more durable and longer-lasting than plastic.

Impeller Maintenance and Repair

The impeller is one of the most critical components of your swimming pool filtration system, and keeping it in good working order is crucial. Regular maintenance is essential to ensure your impeller continues to operate at peak efficiency. Check the impeller for any signs of damage or wear, including cracks, chips, or broken vanes. If the impeller looks damaged, it should be replaced immediately to avoid further damage to the rest of the filtration system.

If the impeller fails, you may notice a lack of water flow through the system or a high-pitched whine coming from the pump. In some cases, the issue can be resolved by cleaning the impeller of any debris or obstructions. If that doesn't solve the problem, the impeller may need to be replaced.


The pool pump impeller is a critical component of your swimming pool filtration system. Regular maintenance, including checking for damage and wear, is essential to keep the impeller operating efficiently. If you notice any issues with your impeller, such as a lack of water flow or abnormal sounds coming from the pump, have it checked out by a professional. By understanding how your pool pump impeller works and how to maintain it, you can ensure your swimming pool remains clean, safe, and fun for all.


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