Pool Filter Lab

Cartridge record

Unicel C-5621

single-source

Verified specifications

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

Cartridge specifications
Outside diameter5-3/16"
Source values
  • unicel 5-3/16"
Length11-7/8"
Source values
  • unicel 11-7/8"
Top cap/ closed w/ string handle
Source values
  • unicel / closed w/ string handle
Bottom cap1-15/16" / open
Source values
  • unicel 1-15/16" / open
Pleats106
Source values
  • unicel 106
Filter area22 sq ft
Source values
  • unicel 22
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
UnicelC-5621single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Advanced Spa Design——unicel 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-5423

5-3/16" × 11-15/16"

cross-checked against 2 sources

5CH-352

5-3/16" × 12-1/2"

cross-checked against 2 sources

5CH-502

5-3/16" × 12-1/2"

cross-checked against 3 sources

5CH-402

5-3/16" × 10-3/4"

cross-checked against 3 sources

C-5346

5-3/16" × 14-1/8"

cross-checked against 2 sources

This is a single-source record. Measure the cartridge before ordering.

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