Pool Filter Lab

Cartridge record

Unicel C-4321

Also sold asOEM 17-2653

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 diameter4-15/16"
Source values
  • unicel 4-15/16"
Length13-5/16"
Source values
  • unicel 13-5/16"
Top cap/ closed w/ raised ring
Source values
  • unicel / closed w/ raised ring
Bottom cap2-1/8" / open
Source values
  • unicel 2-1/8" / open
Pleats106
Source values
  • unicel 106
Filter area25 sq ft
Source values
  • unicel 25
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-4321single-source
OEM17-2653single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Pentair Pool Prod - Rainbow PlasticsLeaf Trap cartridge17-2653unicel single-source
RainbowLeaf Canister—unicel single-source
South Pacific Spas——unicel 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-926

4-15/16" × 13-1/2"

single-source

4CH-949

4-15/16" × 13-1/2"

cross-checked against 2 sources

C-4311

4-15/16" × 12-1/4"

cross-checked against 2 sources

C-4308

4-15/16" × 14-9/16"

cross-checked against 2 sources

C-4332

4-15/16" × 11-7/8"

cross-checked against 2 sources

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

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