Your filter is the hardest-working part of your pool. It traps the dirt, oils, and debris that would otherwise cloud your water, so when the cartridge clogs, circulation drops and the water turns dull fast. The good news is that keeping it clean is simple once you know the schedule. Here is how often to clean a pool filter cartridge, how to do it right, and when it is time to replace it.
Quick answer: Rinse your pool filter cartridge every two to four weeks, and give it a deep soak-and-clean every three to six months. Clean it sooner if the pressure gauge climbs 8 to 10 psi above normal, if the pool gets heavy use, or after a big North Texas storm blows debris into the water.
How Often Should You Clean It?
A good rule of thumb is a quick rinse every two to four weeks and a deep clean every three to six months. That said, your pool is unique, and a few things push that schedule sooner:
- How much you swim: more swimmers means more sunscreen, body oils, and dirt for the filter to catch.
- Your surroundings: nearby trees, gardens, and our gusty Texas winds send leaves and pollen straight into the cartridge.
- Water chemistry: unbalanced water leads to scale that clogs the pleats and drags down efficiency.
- Filter pressure: watch the gauge. A rise of 8 to 10 psi above the normal reading is your cue that the cartridge needs cleaning.
How to Clean a Filter Cartridge, Step by Step
Regular cleaning keeps the cartridge trapping dirt and helps it last longer. Here is the safe way to do it:
- Turn off the pump. Never open the system while it is running. Shut the pump down first to avoid damage.
- Release the pressure. Open the air release valve on the filter housing to relieve pressure before you open it up.
- Remove the cartridge. Lift it out carefully so you do not crease or tear the pleats.
- Rinse top to bottom. Use a garden hose with a nozzle and work down between the pleats. Skip the pressure washer, since it can shred the filter material.
- Soak if needed. For heavy grime or calcium buildup, soak the cartridge in a filter cleaning solution for a few hours to break down what a rinse cannot.
- Rinse again and dry. Give it a final rinse and let it dry fully before putting it back.
When to Replace the Cartridge Instead
Even a well-kept cartridge wears out eventually. Swap it for a new one when you notice:
- Torn or flattened pleats: visible damage means it can no longer trap debris well.
- High pressure after cleaning: if the gauge stays high even after a thorough clean, the cartridge is spent.
- Brittle or discolored material: if it looks worn or cracks easily when handled, it is time.
If your filter is struggling even with a fresh cartridge, the housing or internal parts may be the issue. That is where our pool filter repair service comes in.
Let Us Keep Your Filter in Top Shape
Staying on schedule prevents clogs, protects water clarity, and heads off costly repairs down the road. If you would rather not handle it yourself, we take care of it as part of routine filter cleaning and full weekly pool service. And if your water has already turned cloudy or green, our green-to-clean service gets it crystal clear again.
Frequently Asked Questions
How often should I clean my pool filter cartridge?
Rinse it every two to four weeks and deep clean it every three to six months. Clean sooner if the pressure gauge rises 8 to 10 psi above normal, the pool sees heavy use, or a storm blows in extra debris.
How do I know when my filter needs cleaning?
The pressure gauge is the clearest sign. When it reads 8 to 10 psi above the normal level, the cartridge is clogged and reducing circulation, so it is time to clean it.
Can I use a pressure washer to clean the cartridge?
No. High-pressure washers can tear the pleats and ruin the filter. Use a garden hose with a nozzle and rinse from top to bottom instead.
How long does a pool filter cartridge last?
With regular cleaning, most cartridges last one to three years. Replace it when the pleats are torn, the material is brittle, or pressure stays high even after a thorough cleaning.
Want your filter and water handled for you? As your local 5-star team, we keep pools clear across McKinney and the surrounding North Texas area. Contact us or call (469) 884-4022 for a free estimate.
