Filter Systems: Understanding the Different Types

A woman's hand is hovering above the water. She is gently touching the water with one finger.

At Swimline Distributors, our goal is to provide you with the best pool supplies and equipment. We understand the importance of staying informed about the latest products and technologies. Today, we want to shed some light on the topic of filter systems, a vital component in swimming pools.

Filter systems play a significant role in keeping pools crystal clear and safe for your clients. It’s important to understand the different filter systems in order to provide your clients with the best possible option for their situation. There are three primary types of filter systems available, each with its own advantages and ideal-use cases. Let’s dive into the world of pool filters and explore the different options.

Sand Filter Systems

Sand filters are one of the most common and reliable types of filtration systems. They use special-grade sand as the filtering medium to trap debris and particles from the water. Sand filters are cost effective and straightforward to maintain. They’re suitable for most residential pools and some commercial applications.

Sand filters work by pushing water through a tank filled with sand. As the water flows through the sand, debris, and impurities are captured, leaving clean water to return to the pool or spa. Periodically, sand filters require backwashing to flush out the accumulated debris, ensuring optimal performance.

Cartridge Filter Systems  

Cartridge filters are known for their excellent filtration efficiency and minimal water wastage during cleaning. These filters utilize replaceable filter cartridges made of pleated fabric to capture debris. Cartridge filters are an excellent choice for smaller pools, spas, and regions with water restrictions.

Cartridge filters operate by passing water through the cartridge element, which traps particles as small as 10 microns. Unlike sand filters, cartridge filters don’t require backwashing. Instead, you remove and clean the cartridge periodically. This makes them eco-friendly and cost-effective over time.

DE Filter Systems (Diatomaceous Earth)

DE filters employ a fine, white powder known as diatomaceous earth to provide the finest level of filtration. They are highly effective at removing even the tiniest particles and impurities from the water. D.E. filters are often used in large commercial pools and require periodic maintenance to recharge with diatomaceous earth.

D.E. filters work by coating a grid or element inside the filter with diatomaceous earth. As water passes through, the medium captures debris, leaving the water crystal clear. Periodically, you’ll need to backwash and recharge the filter with fresh diatomaceous earth. These systems also have filter grids that must be properly cleaned on occasion in order to maintain effectiveness.


Choosing the right filter system depends on various factors, including the pool size, usage, budget, and local water conditions. Our knowledgeable staff at Swimline Distributors is here to assist you in making the best selection for your specific needs. We take pride in offering a wide range of high-quality sand filters, cartridge filters, and DE filters from trusted manufacturers.

Remember, a well-maintained filter system is essential for keeping swimming pools safe and inviting. Regular maintenance, cleaning, and replacement of filter elements when necessary will help ensure your clients enjoy their aquatic oasis to the fullest. Understanding each filter type will help you provide your clients with the best possible option.

Thank you for choosing Swimline Distributors as your trusted partner in the pool and spa industry. We are committed to providing you with the finest sand filters, cartridge filters, and D.E. filters to help you deliver exceptional service to your clients. If you have any questions or need assistance, please don’t hesitate to reach out to our friendly team. Together, we’ll continue to make a splash in the Southeast and beyond!

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