Pool Filter Lab

Cartridge record

Unicel 4CH-20

Also sold asPleatco PHC25Pleatco PHC25P4Pleatco PSG25P4Filbur FC-0125Filbur FC-0185OnCore OC-406COEM 20241-238OEM PVT 25

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 5"
Length6-3/4"
Source values
  • unicel 6-3/4"
  • pleatco 6-5/8"
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 1 7/8
Pleats204
Source values
  • unicel 204
Filter area20 sq ft
Source values
  • unicel 20
  • 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-20cross-checked against 3 sources
PleatcoPHC25single-source
PleatcoPHC25P4single-source
PleatcoPSG25P4single-source
FilburFC-0125single-source
FilburFC-0185single-source
OnCoreOC-406Csingle-source
OEM20241-238single-source
OEMPVT 25single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Hercules Pool Products4 5/8 X 6 3/4,TSC—pleatco single-source
Master Spas——unicel single-source
Saratoga Spas—20241-238unicel single-source
Softub——unicel single-source
Unicel20 sq.ft. top load—unicel single-source
Vita SpaSaratoga Spas—pleatco single-source
Vita Spas—PVT 25unicel 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-925

4-5/8" × 7-1/4"

cross-checked against 2 sources

C-4314AM

4-5/8" × 6"

single-source

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

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