5 Tips for Cleaning Pool Filter Cartridges Without Ruining Them

Never use a pressure washer A pressure washer will shred the pleats and destroy the cartridge. Use a garden hose with a fan spray nozzle instead.

Spray at an angle, not straight on Hold the nozzle at an angle to blast dirt out from between the pleats. Spraying straight on drives debris deeper into the fabric.

Soak overnight in chemical cleaner Use a dedicated filter cleaner with a TSP substitute, not dish soap. Soak overnight, then rinse thoroughly.

Don’t scrub or let it dry out Gentle rinsing is enough. Scrubbing with a brush can tear the fabric. Clean the cartridge before it dries completely, because dried-on crud is much harder to remove.

Replace when pleats feel thin or frayed Cartridges typically last 1–2 seasons. Replace them once the fabric starts feeling weak or shows visible wear.