Pool Filter Lab

Cartridge record

Unicel C-4324

Also sold asPleatco PGS25Pleatco PGS25P4Filbur FC-0187

cross-checked against 2 sourcesDiscontinuedReplacement: 4CH-24

Verified specifications

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

Cartridge specifications
Outside diameter4-5/8"
Source values
  • unicel 4-5/8"
  • pleatco 4-3/4"
Length9-3/4"
Source values
  • unicel 9-3/4"
  • pleatco 10"
Top cap/ molded cone handle
Source values
  • unicel / molded cone handle
  • pleatco Handle
Bottom cap1-9/10" / open
Source values
  • unicel 1-9/10" / open
  • pleatco P4
Pleats173
Source values
  • unicel 173
Filter area25 sq ft
Source values
  • unicel 25
  • pleatco 25
Media weight3 oz
Source values
  • unicel 3
  • pleatco 3

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-4324cross-checked against 2 sources
PleatcoPGS25single-source
PleatcoPGS25P4single-source
FilburFC-0187single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Aqua SpasAdvanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Gatsby SpasAdvanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Gatsby Spas——unicel single-source
Master SpasAdvanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Master Spas——unicel single-source
Quantum SpasAdvanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Quantum Spas——unicel single-source
Softub SpasAdvanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Spa Manufacturer’s Inc.Advanced/LA Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Spa Manufacturers Inc.——unicel single-source

Browse related equipment

Source notes

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-21

4-5/8" × 8"

cross-checked against 3 sources

4CH-25

4-5/8" × 8"

single-source

4CH-252

4-5/8" × 8"

cross-checked against 2 sources

C-4327

4-5/8" × 11-5/8"

single-source

C-4327AM

4-5/8" × 11-5/8"

single-source

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