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The cartridge pool filter is a type of pool filter that uses a cloth-like material to filter water in your pool. The cartridge filter is an important component of your swimming pool's filtration system. 

Over time, the pool filter cartridges may get clogged with dirt, debris, and other contaminants. This may reduce the filter's overall effectiveness and efficiency. If not promptly replaced, they may go on to damage your pool’s pump and other equipment. So, as a pool owner, knowing when to replace your cartridge pool filter is vital. 

Signs You Need To Replace Your Pool Cartridge Filter

1. Poor Water Quality 

If you notice your water is staying cloudy or green despite using Swimming Pool Chlorinators, sanitizers, and filtration, it may be a sign your filter cartridge needs replacement. You should still try cleaning out the cartridge first to see if any dirt or debris clogged in the cartridge is hindering its efficiency. If this doesn’t offer any substantial results, you may need to replace it. 

Swimming Pool Chlorinator

2. High PSI Reading

If you notice a spike in the pressure reading on your pool cartridge filter, it may be a sign of a dirty or clogged cartridge. The high PSI reading may also result from a dirty cartridge, in which case you should give it a cleaning session. If the treated cartridge still shows high PSI readings, it must be replaced. 

3. Cracked End Caps

The end caps on your cartridges hold the cloth-like pleats in place, sort of like bookends. Over time, the effects of water chemicals and pressure can lead to the end caps cracking. It needs to be replaced if you notice any chipping or cracking on the carriage end caps. If pieces of the end cap chip off, they may pass through to the filter system and cause damage to your pool. 

4. Signs of Wear and Tear

Next, you need to look for general wear and tear signs on your pool cartridge filter. If the filters look frayed and tattered, they have passed their life expectancy and can no longer effectively filter pool water for you. The cartridge filter may also have noticeable holes or tears due to the effects of debris. Cleaning such filter cartridges won't be enough; they must be replaced immediately. 

5. Broken Cartridge Bands

You will notice several bands running around the cartridge; these are added to prevent the pleats from losing their shape due to the turbulence caused during water filtration. These bands may start breaking down at some point. The more breakage your bands bear, the less effective they are at keeping your cartridge pool filter pleats in shape. If you notice significant breakage, you should have the cartridge replaced. 

6. Deformed Filter Pleats

New filters tend to have consistently placed pleats; as they filter dirt, debris, and other contaminants, they will start to flatten and lose their shape over time. Flattened filter pleats can no longer filter water the same way and should be replaced. 

Your filter cartridge may appear clean, but even the best cartridges need to be replaced at some point. On average, you should replace your pool filter cartridge every 1-2 years. If you notice any of the signs mentioned above, you need to replace the filter as soon as possible for clean, clear, and healthy swimming. 

If you want to learn more about Pool Sand Filter, here are some answers to your questions:

What Is Pool Cartridge Filters Made Of?

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How to Change Cartridge Pool Filter?

How To Backwash Cartridge Pool Filter?

How Much Are Cartridge Pool Filters?

How Long Does a Cartridge Pool Filter Last?

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