Pool Filter Lab

Cartridge record

Unicel C-4601

Also sold asPleatco PL18Filbur FC-3745

cross-checked against 2 sourcesDiscontinuedReplacement: C-4618

Verified specifications

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

Cartridge specifications
Outside diameter4-3/4"
Source values
  • unicel 4-3/4"
  • pleatco 4-7/16"
Length18"
Source values
  • unicel 18"
  • pleatco 18"
Top cap1-1/4" / open
Source values
  • unicel 1-1/4" / open
  • pleatco 1 1/4
Bottom cap2-7/16" / open
Source values
  • unicel 2-7/16" / open
Pleats69
Source values
  • unicel 69
Filter area16 sq ft
Source values
  • unicel 16
  • pleatco 16
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-4601cross-checked against 2 sources
PleatcoPL18single-source
FilburFC-3745single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Lomart60-4316—unicel single-source
Lomart60-4318—unicel single-source
LomartLomart (60-4316-4318)—pleatco single-source

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.

C-4616

4-3/4" × 16"

cross-checked against 2 sources

C-4611

4-3/4" × 11"

cross-checked against 2 sources

C-4307

4-3/4" × 8"

cross-checked against 2 sources

C-4309

4-3/4" × 8"

cross-checked against 2 sources

C-4608

4-3/4" × 8"

cross-checked against 2 sources

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