Cartridge Filters For Pools and Spas


Keep your pool or spa sparkling clean with our range of pool cartridge filters

Pool cartridge filters are compact, efficient, and highly effective at capturing even the tiniest particles of debris from your pool — in fact, cartridge pool filters can catch particles as small as 10 microns in size. At Direct Pool Supplies, we stock a great range of cartridge pool filters and accessories along with replacement pool filter cartridges

Need help choosing the right pool cartridge filter? Our team is on hand to assist you. With over 25 years of experience in the pool supplies business, our highly trained and experienced consultants can work with you to find the right pool cartridge filter solution for your pool or spa. 

FAQs about cartridge filters for swimming pools and spas

What’s the difference between a sand filter and a cartridge filter?

Sand filters and cartridge filters for swimming pools both perform the same function, however, the materials they’re made of, their maintenance requirements, and their effectiveness vary. 

  • Construction. As the name suggests, sand filters, or media filters as they’re also known, contain sand, zelbrite, or glass. The sand or other medium is what catches particles and debris from your pool. Pool cartridge filters meanwhile utilise filter cartridges that contain synthetic filter fabrics attached to a central plastic frame. 
  • Effectiveness. Cartridge filters can capture much smaller particles than sand or media filters. 
  • Cost. In terms of cost, both sand and cartridge filters work out about the same over the course of 5 years. While sand filters are more expensive up front they require less ongoing maintenance, whereas cartridge filters tend to have a lower upfront cost but require annual filter cartridge replacements.

Maintenance. When it comes to maintenance because cartridge pool filters are so effective at capturing particles and debris they do require more cleaning than sand filters.
How often should I replace my cartridge filter?

There is no set time span for cartridge filter replacement. If you maintain your filter well it can last for 3-5 years, but heavy use and environmental factors can make your pool cartridge filter ready for a replacement sooner. Here are signs that it’s time to replace your filter cartridge:

  • Damaged filters or pleats. If your filter is looking visibly tattered or frayed this is an indication that it’s reached the end of its working life. If the pleats of your filter have become flattened or misshaped this is another indication your filter needs to be replaced. 
  • High post-cleaning PSI. When your pressure gauge gives a higher than optimal reading, this is an indication your filter needs to be cleaned. If, after a thorough cleaning, your pressure gauge reading is still too high this is an indication that your filter can no longer properly filter water and needs to be replaced. 

A crushed cartridge. Filter cartridges can be suddenly and severely damaged by things like too much pressure building up, cheap replacement parts weakening its integrity or the wrong cartridge size being used. It will be quite obvious when this happens as your filter will be visibly damaged and unable to function.
When should I clean my pool cartridge filter?

You should clean your pool cartridge filter in all the following circumstances:

  • When your filter pressure is unusually high. Pool filter cartridges have an optimal operating pressure (we recommend recording this for future reference when you purchase a new pool cartridge filter). When your pressure gauge is reading at 8 PSI or more above your filter’s optimal pressure this is an indication your filter is clogged and needs to be cleaned. 
  • After your pool experiences heavy usage. After a pool party or other occasion which sees large numbers of people using your pool at once, your pool will be filled with high levels of debris, skin cells, and other contaminants which can clog your filter. Get into the habit of cleaning your cartridge filter after-parties and other heavy pool usage events. 
  • After a storm. High winds and rain storms can cause large amounts of leaves and other debris to find their way into your pool. Once you’ve cleared out all the physical debris you’ll need to clear out your filter as well as it will likely be clogged with smaller particles.
  • After an algae bloom. No matter how thoroughly you remove the algae from your pool, heavy algae will always leave your filter in need of a good clean. After treating the algae bloom with a suitable algaecide, thoroughly clean out your filter cartridge as well. 

To clean your pool filter cartridge, hose out debris with a garden hose making sure to clean in between the pleats. We also recommend giving your cartridge a thorough clean by soaking it in a pool filter cleaning solution such as ILUKA Klenz.

Cartridge pool filters with Direct Pool Supplies

At Direct Pool Supplies, we are proud members of SPASA, the Swimming Pool & Spa Association of Australia. That means that when you source your pool cartridge filters and other pool supplies from us you know you’re getting the best quality at the fairest prices. 

Order your new cartridge pool filter online today or visit us in-store. Need a hand choosing the right filter or have a question about one of our products? We’re here to help! Get in touch with our expert team today for advice on cartridge filters for swimming pools. We offer free shipping on select orders — simply add your postcode to our shipping calculator at checkout for an instant shipping quote. 


Davey Whisper 500 pump

Davey Whisper 500 pump


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