Cartridge Filter Collapse
Fix crushed and damaged filter cartridges
Collapse Warning Signs
🚨 Immediate Signs
- • Sudden pressure drop
- • Reduced water flow
- • Pump sounds different
- • Poor filtration
⚠️ Damage Types
- • Crushed pleats
- • Broken center core
- • Torn filter fabric
- • Snapped bands
Quick Answer
Cartridge filter collapse is a serious failure requiring immediate pump shutdown and filter replacement. Collapse occurs when excessive pressure crushes the pleats inward, destroying the filter's structure. Common causes include running too long without cleaning, oversized pumps, or aged filters. The damaged cartridge cannot be repaired and must be replaced. Check for debris in the tank and pump before installing a new filter. To prevent future collapses, monitor pressure closely, clean regularly, and replace cartridges every 1-2 years.
Professional service recommended for this issue
Filter Collapse Safety Alert
- •Stop pump immediately to prevent impeller damage
- •Filter debris can clog pump and plumbing
- •Do not attempt to repair collapsed cartridges
- •Check for pieces in pump strainer basket
- •System may have reduced flow after collapse
- •Install correct replacement size to prevent recurrence
Cartridge Filter Construction
Filter Components
- • Pleated Fabric: Polyester filter media
- • Center Core: PVC support structure
- • End Caps: Seal top and bottom
- • Reinforcing Bands: Prevent pleat separation
- • Outer Wrap: Some have protective layer
Failure Points
- • Pleat Crushing: Excessive pressure differential
- • Core Collapse: Structural failure of center
- • Band Breakage: Allows pleat separation
- • End Cap Failure: Seal breakdown
- • Media Tears: Fabric ruptures under stress
Pressure Limits:
Most cartridge filters have a maximum pressure rating of 30 PSI. Operating above this pressure, even briefly, can cause catastrophic collapse. Always replace filters before they reach pressure limits.
Assessing Filter Damage
Step-by-Step Diagnosis
Turn Off Pump Immediately
Stop system to prevent further damage to filter and pump.
⚠️ Warning: Continued operation can damage pump impeller
Check System Pressure
Note if pressure was abnormally high before collapse.
Remove Filter Cartridge
Open tank and carefully extract damaged cartridge.
⚠️ Warning: Support cartridge weight to prevent further damage
Inspect Damage Pattern
Look for crushed pleats, broken bands, or torn fabric.
Check for Debris
Examine tank for pieces of filter material or bands.
⚠️ Warning: Remove all debris before installing new filter
Evaluate Other Cartridges
In multi-cartridge systems, check all filters for damage.
Why Cartridge Filters Collapse
Excessive Pressure
Causes:
- • Dirty filter not cleaned
- • Oversized pump
- • Restricted return lines
Prevention:
- • Clean at 8-10 PSI rise
- • Size pump properly
- • Clear obstructions
Result:
Pleats crush inward under differential pressure
Age & Deterioration
Signs:
- • Fabric weakening
- • Brittle end caps
- • Band deterioration
Timeline:
- • 12-18 months typical
- • Heavy use: 8-12 months
- • Light use: 18-24 months
Action:
Replace before structural failure occurs
Improper Cleaning
Mistakes:
- • High-pressure spray
- • Aggressive brushing
- • Wrong chemicals
Damage:
- • Tears fabric
- • Loosens pleats
- • Weakens structure
Correct Method:
Gentle rinse, proper cleaners, low pressure
Cartridge Replacement Process
Proper Replacement Steps
System Shutdown
Turn off pump, release pressure, close valves
Remove Damaged Filter
Open tank, carefully extract collapsed cartridge
Clean Tank & Check Debris
Remove any filter pieces, inspect tank condition
Verify Replacement Size
Match exact dimensions and square footage
Install New Cartridge
Position correctly, ensure proper seating
System Startup
Bleed air, check pressure, verify flow
Pro Tip:
Always keep a spare cartridge on hand. When one fails, you can immediately replace it and clean the dirty one at your convenience.
Proper Filter Sizing
Cartridge Size Requirements
| Pool Size | Min Filter Area | Recommended | Max Flow Rate |
|---|---|---|---|
| 10,000 gal | 100 sq ft | 150 sq ft | 100 GPM |
| 15,000 gal | 150 sq ft | 200 sq ft | 150 GPM |
| 20,000 gal | 200 sq ft | 300 sq ft | 200 GPM |
| 30,000 gal | 300 sq ft | 400 sq ft | 300 GPM |
Note: Undersized filters lead to frequent cleaning and premature collapse.
Replacement Costs
Cartridge Filter Replacement
🔧 DIY Attempt
⚠️ Risks:
- • Choosing wrong filter size
- • Missing debris in system
- • Improper installation
- • Not addressing root cause
- • Damage during installation
👷 Professional Service
✅ Includes:
- • Complete system inspection
- • Proper filter selection
- • Professional installation
- • Debris removal from system
- • Pressure testing
- • Prevention recommendations
💰 Value Tip: CoOpPools offers transparent pricing with no hidden fees. Our worker-owned model means fair prices and invested service.
Prevent Filter Collapse
Prevention Tips
Monitor Operating Pressure
Keep pressure below manufacturer maximum (usually 30 PSI)
Clean Filters Regularly
Clean when pressure rises 8-10 PSI above starting
Use Proper Cleaning Methods
Avoid high-pressure washing that damages pleats
Replace Filters On Schedule
Change cartridges every 1-2 years before failure
Size System Properly
Ensure pump and filter are correctly matched
🏊 Pro Tip: Regular professional maintenance prevents 90% of pool problems.Get your maintenance quote today
This Issue Requires Professional Service
Collapsed filter cartridge? Our technicians can quickly replace damaged filters and diagnose why the collapse occurred. We'll check your entire system, ensure proper sizing, and help prevent future failures. We stock common replacement cartridges for immediate service. Don't risk pump damage - call for emergency filter replacement!
Mention "cartridge filter collapse" when calling for faster service
Related Pool Problems
Related Pool Problems
High Filter Pressure
Often RelatedPrimary cause of collapse
Short Filter Cycles
Sometimes RelatedOverloaded filters fail faster
Filter Not Clearing
Sometimes RelatedDamaged filters can't clean
💡 Did You Know? Pool problems often occur together.Cartridge Filter Collapse can lead to or be caused by these related issues. Understanding the connections helps prevent future problems.