Pool Filter Lab

Cartridge record

Unicel 5CH-37

Also sold asPleatco PFF42TC-P4Filbur FC-2402OnCore OC-509AOEM 303279

cross-checked against 2 sources

Verified specifications

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

Cartridge specifications
Outside diameter5-5/16"
Source values
  • unicel 5-5/16"
Length9"
Source values
  • unicel 9"
Top cap/ bar handle
Source values
  • unicel / bar handle
Bottom cap/ 1-1/2” male thread/MPT
Source values
  • unicel / 1-1/2” male thread/MPT
Pleats221
Source values
  • unicel 221
Filter area37.5 sq ft
Source values
  • unicel 37.5
Media weight3 oz
Source values
  • unicel 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
Unicel5CH-37cross-checked against 2 sources
PleatcoPFF42TC-P4single-source
FilburFC-2402single-source
OnCoreOC-509Asingle-source
OEM303279single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Aquaterra Spas—303279unicel single-source
Hot Springs Spas—303279unicel single-source
Unicel37.5 sq.ft. top load—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.

5CH-45

5-5/16" × 10"

cross-checked against 3 sources

C-5345

5-5/16" × 10-1/8"

cross-checked against 3 sources

C-5623

5-5/16" × 13-9/16"

single-source

C-5374

5-5/16" × 14-13/16"

cross-checked against 3 sources

C-5397

5-5/16" × 17-13/16"

cross-checked against 3 sources

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