Pool Filter Lab

Cartridge record

Unicel C-6433

Also sold asPleatco PWK35Filbur FC-3920OEM 31250

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 diameter6"
Source values
  • unicel 6"
  • pleatco 6"
Length9"
Source values
  • unicel 9"
  • pleatco 9"
Top cap1-15/16" / open
Source values
  • unicel 1-15/16" / open
  • pleatco 1 15/16
Bottom cap1-15/16" / open
Source values
  • unicel 1-15/16" / open
  • pleatco 1 15/16
Pleats158
Source values
  • unicel 158
Filter area33 sq ft
Source values
  • unicel 33
  • pleatco 35
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-6433cross-checked against 2 sources
PleatcoPWK35single-source
FilburFC-3920single-source
OEM31250single-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—31250unicel single-source
Hot Springs Spas——unicel single-source
Watkins / Hot Springs SpasWatkins 33—pleatco 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.

6CH-47

6" × 9-1/8"

cross-checked against 3 sources

6CH-402

6" × 9-1/2"

single-source

6CH-49

6" × 8-1/4"

cross-checked against 2 sources

6CH-925

6" × 8-1/4"

single-source

6CH-940

6" × 8-1/4"

cross-checked against 3 sources

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