Cartridge Pool Filters: Keeping Your Pool Clean and Clear

A cartridge pool filter system consists of a tank, valve head, and one or more internal filter cartridges. The system itself is sized to your pool's volume and flow rate. When shopping for replacement cartridges, what matters is matching the right element to your existing housing.

To find the correct pool filter cartridge replacement, you'll need your system's make and model (printed on the tank or in your owner's manual) or the cartridge's physical dimensions: outer diameter, inner diameter, length, and top and bottom end cap configuration and match it. An undersized or incompatible element won't seat properly and will allow unfiltered water to bypass the media entirely. Checking your current cartridge's part number before ordering is the most reliable way to confirm compatibility.

All Filters carries replacements for leading cartridge pool filter brands including Hayward, Pentair, Jandy, and Unicel-compatible options across a wide range of sizes.

Cartridge pool filters have become the dominant choice for above-ground pools and mid-size inground installations, and the advantages extend to the replaceable cartridges at the heart of the system.

Balanced filtration. Pleated polyester pool cartridges capture a range of particles and debris but without the maintenance requirements of other filtration systems.

No backwashing. Sand and DE systems require backwashing to clear spent media, sending hundreds of gallons of pool water to waste. Cartridge systems require no backwashing outside of periodic rinsing.

Simple maintenance. Pool filter cartridge replacement is a DIY task requiring no special tools. Most cartridge systems allow the element to be removed, rinsed with a garden hose, and returned to service within minutes.

Lower operating pressure. Cartridge systems typically run at lower pressure overall than sand or DE, which reduces strain on the pump and can extend equipment life.

Cost-effective upkeep. Replacement pool cartridges run $30 to $150 depending on size, number, and brand compatibility and quality alternatives from SpiroPure bypass name brand pricing but deliver compatible performance.

Getting the most from your pool filter cartridge starts with cleaning it on the right schedule. Check your pressure gauge regularly; when it reads 8–10 psi above your baseline clean pressure, it's time to pull the cartridge and rinse it. Usually every few weeks.

Rinsing. Use a garden hose at moderate pressure, working from the top of the pleats down. Never use a pressure washer.

Deep cleaning. For oil, sunscreen, and heavy mineral deposits that rinsing won't clear, soak the cartridge overnight in a specialized filter cleaning solution or using a mild dish detergent. Rinse thoroughly before reinstalling.

Inspection. Each time you clean the cartridge, inspect and replace it if you observe tears, cracks, or core deformation.

Replacement timing. Pool cartridges typically last one to three years depending on use and water quality. Once a cartridge won't hold pressure or the pleats are visibly compressed and won't rinse clean, it's time for a pool filter cartridge replacement regardless of age.