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Cartridge Filter Life Calculator

Estimate remaining cartridge life and optimal replacement timing based on usage patterns.

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Cartridge Filter Life Calculator

Cartridge Details

Pressure Readings

PSI right after cleaning now vs when new

Environment

Cartridge Status

Estimated Remaining Life

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Total Expected Life

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Life Used

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PSI Creep

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Replace By

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Assessment

Enter cartridge details above.

When to Replace Pool Cartridge Filters

Cartridge filters don't last forever. Over time, the polyester pleats break down, losing their ability to trap debris. Knowing when to replace saves callbacks and keeps customer pools clear.

Signs a Cartridge Needs Replacement

  • PSI creep: Clean pressure is 5+ PSI higher than when the cartridge was new
  • Rapid pressure rise: PSI climbs to dirty level within days of cleaning
  • Physical damage: Torn, frayed, or collapsed pleats
  • Discoloration: Can't clean back to near-white (oils and minerals embedded)
  • Bands separating: End caps cracking or bands coming loose

Extending Cartridge Life

  • Soak in filter cleaner (TSP or commercial degreaser) every 3-6 months
  • Rotate between two sets of cartridges (one soaking while one runs)
  • Never use a pressure washer (damages fibers)
  • Rinse from top down between pleats with garden hose
  • Address water chemistry issues (high calcium and oils shorten life)

Frequently Asked Questions

How long do cartridge filters last?

Typically 1-3 years for the cartridges themselves. With excellent maintenance (regular chemical soaks, light debris load), some last 3-4 years. In heavy-load environments (trees, pets, high bather count), expect 12-18 months.

Should I buy OEM or aftermarket cartridges?

For premium filters (Jandy, Pentair), OEM cartridges are noticeably better — tighter pleat spacing, better end caps. For budget filters, quality aftermarket (Pleatco, Unicel) are comparable at 40-60% of the price. Avoid no-name Amazon cartridges.

Is higher square footage always better?

Yes, more surface area means lower flow per square foot, longer time between cleanings, and longer cartridge life. When replacing, never downsize. Upsizing to the next model is one of the best upgrades for a pool.

Track Filter Maintenance for Every Pool

PoolDial logs equipment details and cleaning dates so you know exactly when each customer's filter was last serviced.

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