Pool Filter Lab

Cartridge record

Unicel C-5431

Also sold asPleatco PWK30VFilbur FC-3910OEM 31233

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 diameter5-1/8"
Source values
  • unicel 5-1/8"
  • pleatco 5"
Length10-1/4"
Source values
  • unicel 10-1/4"
  • pleatco 10-3/8"
Top cap1-15/16" / open
Source values
  • unicel 1-15/16" / open
  • pleatco 1 9/10
Bottom cap1-15/16" / open
Source values
  • unicel 1-15/16" / open
  • pleatco 1 9/10
Pleats157
Source values
  • unicel 157
Filter area30 sq ft
Source values
  • unicel 30
  • pleatco 30
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-5431cross-checked against 2 sources
PleatcoPWK30Vsingle-source
FilburFC-3910single-source
OEM31233single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Hot Springs Spas—31233unicel single-source
Hot Springs Spas——unicel single-source
Watkins / Hot Springs SpasWatkins Hot Spring Spas FH/IH 220V Models—pleatco single-source

Browse related equipment

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-402

5-3/16" × 10-3/4"

cross-checked against 3 sources

C-5426

5-3/16" × 9"

single-source

C-5427

5-3/16" × 11-7/8"

cross-checked against 2 sources

C-5621

5-3/16" × 11-7/8"

single-source

C-5622

5-3/16" × 11-7/8"

single-source

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