4 Signs Your Pool Filter Cartridge Needs Replacing

Pressure climbs 8-10 psi above clean pressure After cleaning, note the clean pressure reading. When it rises 8-10 psi above that, the cartridge is clogged beyond cleaning and needs replacement.

Clean pressure doesn’t return to normal A cleanable cartridge should go back to near its original pressure after cleaning. If it doesn’t, the filter media is worn out.

Visible damage or stiffness Look for tears, frayed ends, or pleats that feel stiff and brittle instead of flexible. If the material is falling apart, replace it.

Cloudy pool despite clean cartridge and balanced chemicals If your pool stays cloudy after fresh chemical balance and a clean cartridge, the filter isn’t working properly. A blown-out cartridge risks sending debris back to the pool or wearing out your pump.