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how often to clean cartridge pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

If you own a pool, it's essential to keep it clean and hygienic. A cartridge pool filter is an essential component of the pool's filtration system, which helps remove dirt, debris, and other contaminants from the water. But how often do you need to clean it for optimum performance? Let's explore.

Understanding Cartridge Pool Filter

A cartridge pool filter is a type of filter used in swimming pools, which uses a filtering element made of a pleated or folded material, usually made of polyester or nylon. The pleats or folds increase the surface area of the filter, allowing it to trap more and smaller particles from the water.

The water enters the pool from the skimmer or main drain and flows through the filter cartridge before returning to the pool. As the water passes through the filter, the debris and contaminants get trapped within the folds of the filter material. Over time, the filter cartridge will become clogged with dirt and debris, reducing its efficiency and raising the pressure in the pool system.

How Often to Clean Cartridge Pool Filter?

The recommended frequency for cleaning a cartridge pool filter is every four to six months, depending on how frequently the pool is used and the amount of debris and contaminants it encounters. However, other factors may also influence how often you need to clean the filter.

1. Pool Usage

The more you use the pool, the more debris it will accumulate, and the faster the filter will clog. If you use your pool regularly, you may need to clean the filter more frequently than someone who only uses their pool occasionally.

2. Pool Surroundings

The environment around your pool can also affect how often you need to clean the filter. If your pool is surrounded by trees or shrubs, you may need to clean the filter more often to remove leaves, twigs, and other debris. Additionally, if you live in an area with heavy rainfall or windy conditions, you may also need to clean the filter more frequently.

3. Pool Chemical Balance

The chemical balance of your pool can also impact the frequency of cleaning the filter. High levels of chlorine or other chemicals can accelerate the clogging of the filter, making it necessary to clean it more often.

4. Type of Filter

Different types of pool filters have different cleaning requirements. Cartridge pool filters are easier to clean than some other filter types such as sand filters, but still require regular maintenance.

5. Manufacturer's Recommendations

Lastly, refer to the manufacturer's recommendations on how often to clean your pool's cartridge filter. This information can typically be found in the owner's manual or on the manufacturer's website.

Steps for Cleaning Cartridge Pool Filter

Now that you understand when and why to clean your pool's cartridge filter, it's time to learn how to do it. Here's a step-by-step guide on how to clean your pool's filter cartridge:

Step 1: Turn off the pool filter system and remove the filter cartridge from the unit, following the manufacturer's instructions.

Step 2: Remove any excess debris or dirt from the cartridge using a hose or a brush. This will make the cleaning process more effective.

Step 3: Prepare a cleaning solution using a filter cartridge cleaner or a mixture of water and muriatic acid, following the manufacturer's instructions.

Step 4: Soak the cartridge in the cleaning solution for the recommended amount of time, usually 12-24 hours.

Step 5: Rinse the filter cartridge thoroughly with a hose, making sure all the cleaning solution is removed. It's important to use high-pressure water for a thorough clean.

Step 6: Reinstall the filter cartridge in the unit, following the manufacturer's instructions.

Step 7: Restart the pool filter system and ensure it's running correctly.


Cleaning your pool's cartridge filter regularly will help maintain your pool's water quality and avoid expensive equipment repairs. By understanding the factors that influence how often to clean your cartridge pool filter and following the recommended steps, you'll be able to keep your pool swim-ready all year round.


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