Pool Filter Lab

Cartridge record

Unicel 4CH-24

Also sold asPleatco PGS25P4Filbur FC-0131OnCore OC-409AOEM 20254-238

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 diameter4-5/8"
Source values
  • unicel 4-5/8"
  • pleatco 4-7/8"
Length9-3/4"
Source values
  • unicel 9-3/4"
  • pleatco 9-7/8"
Top cap/ molded cone handle
Source values
  • unicel / molded cone handle
  • pleatco Handle
Bottom cap/ 1-1/2” male thread/MPT
Source values
  • unicel / 1-1/2” male thread/MPT
  • 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
Unicel4CH-24cross-checked against 3 sources
PleatcoPGS25P4cross-checked against 2 sources
FilburFC-0131single-source
OnCoreOC-409Asingle-source
OEM20254-238single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Advanced Spa Design——unicel single-source
Blue Ridge SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Blue Ridge Spas——unicel single-source
CTA SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
CTA Spas——unicel single-source
Dream Maker SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Dream Maker Spas——unicel single-source
Gatsby SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Gatsby Spas——unicel single-source
Hearthland SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Heartland Spas——unicel single-source
Hydro SpaAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Hydro Spa——unicel single-source
Icon / Keyes SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Icon Spas——unicel single-source
Imperial SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Imperial Spas——unicel single-source
LA Spas / Advanced Spa DesignAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
LA Spas——unicel single-source
Lowes——unicel single-source
Lumi-O——unicel single-source
Mountain Meadows Spa——unicel single-source
Mountain Meadows SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Mountain Mist Spa——unicel single-source
Mountain Mist SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Mountain Spring SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Mountain Springs Spa——unicel single-source
Mountain Stream Spa——unicel single-source
Mountain Stream SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Nemco SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Nemco——unicel single-source
Saratoga SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
Saratoga Spas—20254-238unicel single-source
Unicel25 sq.ft. top load—unicel single-source
White Spring SpasAfter Hours Spas,Threaded 25 sq.ft. w/handle—pleatco single-source
White Springs Spas——unicel single-source

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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