How To Determine When a Filter Cartridge Needs to be Replaced

WRITTEN BY:  Inyo Pools

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Is your pool continuously cloudy? Is your suction cleaner moving slowly or stopped moving all together? Has the pressure from the return jets decreased? These are signs that it may be time to replace the cartridge element. The following guide will help you determine if it is time to replace the filter cartridge.

Things You'll Need

Step by Step


Step 1

Broken Bands- Most cartridges have bands that keep the pleats from flattening out when under pressure. If the bands are broken, the cartridge will need to be replaced because the cartridge is no longer covering it's optimal surface area.

Step 2

Pressure Does Not Decrease- If the pressure reading on the filter gauge remains the same or only slightly decreases after cleaning the cartridge, it’s likely time to replace the cartridge. This is due to the fact that the dirt and oils have embedded themselves within the media of the cartridge.

Step 3

Damaged Fabric- The fabric in the cartridge is generally made of a polyester material. This material will weaken over time due to high pressure, chemicals, and debris. If the fabric frays or develops a hole, the cartridge needs to be replaced.

Step 4

Cracked Top or Bottom- A cracked top or bottom will allow a large amount of water to pass through the cartridge without being filtered.


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Bryan  Posted: 04/14/2017 22:54 PM 

Not mentioned is that a broken band May simply be replaced with a heavy duty zip tie. Of course if there are other indicators for replacing the cartridge as you mentioned.

The cartridge should also we occasionally soak in a filter cartridge cleaning solution so the detergent agents can break down and remove some grease and oils. After soaking the cartridge must be thoroughly rinsed off before using it again.

Em  Posted: 11/25/2016 15:26 PM 

I should have read this 1st before submitting a question, lol. Oh well it never hurts to ask...................

Spyboy809  Posted: 04/13/2014 19:56 PM 

Excellent info, thanx so much. Next time I need parts I'll give you my business. Thanx again, spyboy809