Pool Filter Lab

Cartridge record

Unicel C-8406

Also sold asOEM 178572OEM R173583

single-sourceDiscontinuedReplacement: C-8405

Verified specifications

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

Cartridge specifications
Outside diameter8-7/8"
Source values
  • unicel 8-7/8"
Length39"
Source values
  • unicel 39"
Top cap4" / open
Source values
  • unicel 4" / open
Bottom cap4" / open
Source values
  • unicel 4" / open
Pleats186
Source values
  • unicel 186
Filter area240 sq ft
Source values
  • unicel 240
Media weight4 oz
Source values
  • unicel 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-8406single-source
OEM178572single-source
OEMR173583single-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 - Purex ReplacementsDM-240 Filter178572unicel single-source
Pentair Pool ProdDM-240 FilterR173583unicel 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.

C-8401

8-7/8" × 19-1/2"

cross-checked against 2 sources

C-8402

8-7/8" × 19-1/2"

cross-checked against 2 sources

C-8403

8-7/8" × 19-1/2"

cross-checked against 2 sources

C-8418

8-15/16" × 33-1/8"

cross-checked against 2 sources

C-8425

8-15/16" × 33-1/8"

cross-checked against 2 sources

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

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