PENTAIR

Tagelus® TA100D Top Mount

SKU: EC-145240

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Pool Filter Size Guide

Choosing the correct pool filter ensures clear water, proper flow, and longer equipment life. An undersized filter will clog quickly and reduce circulation, while an oversized filter improves filtration and reduces maintenance.

Filter Types Explained

Cartridge Filters

  • No backwashing required
  • Excellent filtration (10-20 microns)
  • Lower water usage
  • Cleaned manually

Best for: Most residential pools, water-conscious owners

Sand Filters

  • Easy to operate
  • Backwash to clean
  • Lower filtration (20-40 microns)

Best for: Simplicity, minimal hands-on maintenance

DE (Diatomaceous Earth) Filters

  • Finest filtration (2-5 microns)
  • Backwashing + DE recharge required
  • Highest water clarity

Best for: Maximum water clarity, experienced pool owners

Filter Size by Pool Volume

Rule of thumb: Bigger is always better with filters.

Cartridge Filters (Total Square Footage)

Pool Size (Gallons) Cartridge Filter Size
Up to 15,000 100 – 150 sq. ft.
15,000 – 25,000 150 – 300 sq. ft.
25,000 – 35,000 300 – 500 sq. ft.
35,000+ 500+ sq. ft.

✔ Larger cartridges = longer time between cleanings

Sand Filters

Pool Size (Gallons) Sand Filter Size
Up to 15,000 200 lb
15,000 – 25,000 300 lb
25,000 – 35,000 350 lb
35,000+ 500+ lb

DE Filters

Pool Size (Gallons) DE Filter Size
Up to 15,000 24 sq. ft.
15,000 – 25,000 36 sq. ft.
25,000 – 35,000 48 sq. ft.
35,000+ 60 – 72 sq. ft.

Match the Filter to Your Pump

Your filter must handle the maximum flow rate (GPM) of your pump.

Plumbing Size Typical Max Flow
1 1/2″ PVC ~45 GPM
2″ PVC ~65 GPM
2 1/2″ PVC 80+ GPM

⚠️ Running a pump that exceeds the filter’s flow rating can:

  • Damage internal components
  • Reduce filtration efficiency
  • Void manufacturer warranties

Why Oversizing a Filter Is Good

✔ Cleaner water
✔ Lower pressure
✔ Longer time between cleanings/backwashing
✔ Longer filter life
✔ Better compatibility with variable-speed pumps

A larger filter paired with a lower pump speed is the most efficient setup.

Special System Considerations

You may need a larger filter if your pool has:

  • Variable-speed pump running long hours
  • In-floor cleaning system
  • Heavy debris (trees, leaves)
  • Spa spillover
  • High swimmer load

Common Filter Sizing Mistakes

❌ Matching filter size to pump HP only
❌ Choosing the minimum recommended size
❌ Ignoring maximum flow rating
❌ Underestimating debris load

✅ Always size for flow rate and pool volume

Replacing an Existing Filter?

Check the filter label for:

  • Filter type
  • Square footage (cartridge / DE)
  • Tank diameter (sand)
  • Maximum flow rate (GPM)

If you’re unsure, contact us and we’ll help you choose the correct filter.

FIBERGLASS TANK WITH MULTIPORT VALVE, CLAMP STYLE

Our process creates a one-piece, fiberglass reinforced tank with superior strength and durability. Tagelus Top Mount Filters are equipped with a six-position, top-mounted multiport valve.

  • Special lateral design provides superior flow characteristics and long filter cycles for economical operation
  • Maximum Operating Pressure 50 psi
  • Combination water and sand drain makes servicing and winterizing fast and easy
  • 40, 50, and 60D models standard with plastic clamp

Note: Operating Limits – maximum continual operating pressure of 50 psi. Maximum operating water temperature (internal filter) 104°F (40°C).

PRODUCT COMPONENTS

  • Hi Flow™ Valve provides easy control of all filter functions
  • Exceptionally strong one-piece fiberglass-reinforced tank with UV-resistant surface finish for years of service

SUPERIOR DESIGN

The Tagelus filter’s time-proven internal design ensures water is exposed to a maximum surface area of sand for optimal filtration performance and more efficient backwashing. Meanwhile, the flow system design also ensures maximum run times between backwashing to save you time.

LONG-LASTING CONSTRUCTION

The Tagelus filter tank is constructed from one piece of fiberglass-reinforced material to deliver unmatched strength and durability for years of service.

Additional information

Weight 78.00 lbs
Dimensions 31.00 × 31.00 × 47.00 in
Max Water Flow

Port Size

Filter Area

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