Introduction
Is your pool water starting to look murky even though the pump is running? Learning how to clean pool cartridge filters is essential to keep your water clear, safe, and swim-ready. In this guide, you’ll discover a step-by-step process to clean your cartridge filter properly, prevent costly equipment damage, and extend its lifespan.
Why Cleaning Pool Cartridge Filters Matters
Cartridge filters are a vital component of your pool’s filtration system. Over time, they collect dirt, sunscreen, debris, algae, and fine particles. If left uncleaned, they become clogged, reducing water flow and putting stress on your pump. Regular cleaning ensures:
- Clearer water and balanced chemical levels
- Improved pump efficiency
- Extended filter life (saving money on replacements)
- Fewer waterborne bacteria and contaminants
Keeping your filter clean also supports overall water clarity and prevents premature wear on your pool equipment.
Step-by-Step Guide to Cleaning Pool Cartridge Filters
Step 1: Turn Off the Pool System
Before you begin, turn off the pump and the pool system completely to ensure safety. If your system has a timer, set it to “off” so it doesn’t start during cleaning.
💡 Tip: Shut off the breaker connected to your pool pump for extra safety.
Step 2: Relieve the Pressure
Next, open the air relief valve located on top of the filter tank. This step is important to release built-up pressure inside the tank and prevent any sudden bursts when opening the housing.
Step 3: Remove the Filter Cartridge
Loosen the band or clamp that holds the filter housing together. Once it’s open, carefully lift the cartridge filter straight up and out of the tank. Be cautious—there might still be residual water inside.
⚠️ Caution: Pool filters can be heavy and slippery. Use both hands for a steady grip.
Step 4: Rinse Off Loose Debris
Use a garden hose with a spray nozzle to rinse the filter pleats thoroughly. Start from the top and work your way down, spraying at a 45-degree angle to loosen trapped debris.
💡 Tip: A specialized filter cleaning wand can make this process easier and faster.
Step 5: Deep Clean with Filter Cleaner (Optional but Recommended)
If the filter is stained, greasy, or has been in use for months, soak it in a commercial cartridge filter cleaner. Follow the product instructions, usually involving a soak in a large container for several hours.
- Use a plastic bin or a tall trash can for soaking.
- Rinse thoroughly after soaking to remove all chemical residue.
Step 6: Inspect the Cartridge
Look for signs of wear such as:
- Frayed or torn pleats
- Cracks in the plastic ends
- Warped structure
If you notice any of the above, it may be time to replace the filter entirely.
Step 7: Reassemble the Filter
Once the cartridge is clean and dry (or just well-rinsed), place it back into the housing, making sure it’s properly aligned. Secure the clamp or band tightly and ensure no gaps remain.
Step 8: Restart the System
Turn the pump system back on and close the air relief valve once water begins to flow steadily from it. This indicates the filter tank is full and under proper pressure again.
💡 Tip: Check the pressure gauge—if it’s significantly lower than before cleaning, you’ve done it right!
Common Mistakes to Avoid
1. Not Cleaning Regularly
Neglecting filter maintenance leads to poor water circulation and algae growth. Clean your cartridge every 4 to 6 weeks or as needed based on pool usage.
2. Using a Pressure Washer
Never use high-pressure water—it can damage the pleats and reduce filtration efficiency.
3. Skipping Chemical Soaks
Rinsing alone may not remove oils and fine debris. Chemical soaks are essential for a deep clean, especially if the pool sees heavy use.
4. Forgetting to Bleed Air
If you don’t bleed the air from the system after reassembly, pressure can build up dangerously. Always open the relief valve during restart.
5. Ignoring Filter Wear
Don’t reuse damaged filters. A compromised cartridge lets debris pass through and can cause cloudy or unsafe water.
Extra Tips & Pool Hacks
- Have a spare filter on hand. Rotate between two cartridges so one can dry out completely after cleaning.
- Mark your calendar. Set reminders for routine cleanings to prevent issues before they start.
- Soak overnight during off-season. Give your filter a deep clean and rest before storing it for winter.
🧼 Related Tip: [Check out our guide on how to shock your pool properly] to boost water clarity after deep cleaning your filter.
Conclusion
Cleaning your pool cartridge filter doesn’t need to be a complicated task. By following the steps above, you’ll maintain clean, clear water and protect your pool system from unnecessary strain. Remember: a clean filter is the heart of a healthy pool.
👉 Bookmark this guide so you’re ready for your next pool maintenance day!