Pool Filter Lab

Cartridge record

Unicel C-4440

Also sold asPleatco PSD40Filbur FC-2710OEM 6540-495

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 diameter4-5/8"
Source values
  • unicel 4-5/8"
  • pleatco 4-5/8"
Length16-3/4"
Source values
  • unicel 16-3/4"
  • pleatco 16-3/4"
Top cap/ castle
Source values
  • unicel / castle
  • pleatco Castle
Bottom cap2-1/16" / open
Source values
  • unicel 2-1/16" / open
  • pleatco 2 1/16
Pleats158
Source values
  • unicel 158
Filter area40 sq ft
Source values
  • unicel 40
  • pleatco 40
Media weight4 oz
Source values
  • unicel 4
  • pleatco 4

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-4440cross-checked against 2 sources
PleatcoPSD40single-source
FilburFC-2710single-source
OEM6540-495single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Del Sol Hermosa—6540-495unicel single-source
Sundance SpasSundance 40—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.

4CH-35

4-5/8" × 16"

cross-checked against 3 sources

4CH-940

4-5/8" × 15"

cross-checked against 2 sources

4CH-50

4-5/8" × 14-3/4"

cross-checked against 3 sources

4CH-65

4-5/8" × 19-5/8"

cross-checked against 2 sources

4CH-934

4-5/8" × 12-1/2"

single-source

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