Pool Filter Lab

Cartridge record

Unicel C-4428

Also sold asPleatco PPI25Pleatco PPI25DFilbur FC-2620OnCore OC-510J

cross-checked against 3 sources

Verified specifications

The selected value is shown first. Expand any row to compare the source values retained by the dataset.

Cartridge specifications
Outside diameter4-15/16"
Source values
  • unicel 4-15/16"
  • pleatco 5-1/8"
Length9-13/16"
Source values
  • unicel 9-13/16"
  • pleatco 9-13/16"
Top cap2-1/8" / open
Source values
  • unicel 2-1/8" / open
  • pleatco Closed
Bottom cap2-1/8" / open
Source values
  • unicel 2-1/8" / open
  • pleatco 2 3/16
Pleats148
Source values
  • unicel 148
Filter area25 sq ft
Source values
  • unicel 25
  • pleatco 25
Media weight4 oz
Source values
  • unicel 4
  • pleatco 4

Equivalent part numbers

Match the complete printed string. Similar-looking part numbers can describe different end caps or lengths.

Cross-reference equivalents
BrandPart numberVerification
UnicelC-4428cross-checked against 3 sources
PleatcoPPI25single-source
PleatcoPPI25Dsingle-source
FilburFC-2620single-source
OnCoreOC-510Jsingle-source

Known equipment fits

Fitments are source-attributed. Confirm the housing model and cartridge measurements before ordering.

Filter and spa fitments
BrandModelOEM partSource
Santana SpasSantana 25—pleatco single-source
Santanna——unicel single-source

Dimension neighbors

Records with the same outside diameter and a different length appear first, followed by the closest diameters. End-cap details still need to match.

4CH-935

4-15/16" × 9-1/4"

cross-checked against 2 sources

C-4335

4-15/16" × 9-1/4"

cross-checked against 3 sources

C-4429

4-15/16" × 10-3/8"

cross-checked against 2 sources

C-4431

4-15/16" × 10-3/8"

single-source

C-4339

4-15/16" × 11-1/4"

cross-checked against 3 sources

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