how to clean the cartridges in a pool filter


Author: PoolKing - Pool Sand Filter Manufacturers

How to Clean the Cartridges in a Pool Filter: A Comprehensive Guide

If you own a swimming pool, you know how important it is to keep it clean and well-maintained. And one of the critical components of your pool’s filtration system is the cartridge filter. Over time, the cartridges can become dirty and clogged, reducing the filter’s efficiency and impairing water circulation. So, how do you clean the cartridges in a pool filter? In this article, we’ll provide you with a comprehensive guide on cleaning and maintaining your pool filter cartridges.

Understanding the Role of Pool Filters

Pool filters are responsible for removing dirt, debris, and other impurities from the water as it circulates through the filtration system. The filters work by trapping these impurities inside cartridges or grids, which capture small particles that would otherwise pass through the filter media. The clean water is then recirculated back into the pool, ensuring hygienic and safe swimming conditions.

Pool filter cartridges are one of the most popular types of filters used in residential swimming pools. They are highly effective and easy to maintain, making them a top choice for pool owners seeking hassle-free filtration systems.

Why Clean Cartridges are Vital for Your Pool

While pool filters perform the critical task of removing impurities from the water, dirty filter cartridges can hinder their performance, causing several issues. Here are some reasons why clean cartridges are vital for your pool:

- Increased Efficiency: A clogged cartridge filter reduces the flow rate of water, which means that it takes longer for the water to circulate through the filtration system. This, in turn, reduces the filter’s efficiency, making it more challenging to maintain a clean and healthy swimming pool.

- Lower Maintenance Costs: Dirty cartridges can damage other components of the filtration system, such as the pump, which means that you’ll have to spend money on repairs and maintenance.

- Better Water Quality: Clean cartridges can trap even the smallest particles and impurities, ensuring that the water in your pool remains clean, clear, and safe for swimming.

- Longer Lifespan: By maintaining your filter cartridges, you can extend their lifespan and reduce the need for replacements, saving you money in the long run.

Cleaning Pool Cartridges: Step-by-Step Guide

Here’s a step-by-step guide on how to clean the cartridges in your pool filter:

Step 1: Turn off the pool pump

Before you start cleaning the cartridges, turn off the pool pump to avoid any accidents.

Step 2: Remove the cartridges

The next step is to remove the filter cartridges from the filter housing. To do this, you’ll need to:

- Open the filter housing lid. The location of the lid varies depending on the type of filter you have. It could be on top of the filter, on the side, or at the bottom.

- Unscrew the locking ring to loosen the filter's housing.

- Remove the cartridges carefully to avoid damaging them.

Step 3: Hose Down the Cartridges

Using a high-pressure hose, spray the cartridges down to remove any loose debris and dirt. Make sure to spray them from top to bottom as this will help dislodge any debris trapped inside. Be gentle while washing so as not to damage the pleats.

Step 4: Soak the Cartridges in a Cleaning Solution

After spraying the cartridges down, soak them in a cleaning solution. Typically, you can use a cartridge cleaning solution that you can purchase from a pool supply store. Follow the manufacturer's instructions when preparing the solution.

Submerge the cartridges fully and let them soak for at least 12 hours.

Step 5: Rinse the Cartridges

After the cartridges have soaked for 12 hours, rinse them thoroughly to remove any remaining dirt or debris.

Step 6: Reinstall the Cartridges

Once you’ve rinsed the cartridges, reinstall them in the filter housing. Make sure to align the cartridges properly, and tighten the locking ring securely.

Step 7: Turn on the Pool Pump

Now, it's time to turn on the pool pump and resume normal filtration. Be sure to check for leaks, unusual noises, or any other issues that may occur after cleaning.

Maintaining Your Pool Filter Cartridges

Cleaning your pool filter cartridges is an essential part of pool maintenance. However, you can also take several steps to maintain clean cartridges and keep your pool filtration system in top condition.

- Regular Cleaning: It's recommended to clean your pool cartridges at least once every three months.

- Chemical Balance: Maintaining the proper pH and chlorine levels in your pool will help extend the lifespan of your cartridges.

- Skimming: Using a skimmer regularly will help remove larger debris and prevent your cartridges from becoming clogged.

- Backwashing: Backwashing your system can help remove any debris that may have accumulated in your cartridges, reducing the need for frequent cleaning.


Cleaning your pool filter cartridges is critical for maintaining clean and healthy swimming water. By following the steps outlined in this guide and taking preventative measures, you can extend the lifespan of your filtration system and keep your pool in top condition. Remember to consult your manufacturer's manual for specific instructions, and do not hesitate to seek professional help if needed. So, go ahead and clean your pool cartridges today to ensure hygienic and safe swimming water.


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