Cartridge record

Unicel C-2304

Name: Unicel C-2304 filter cartridge
Brand: Unicel
SKU: C-2304

Also sold asPleatco PH3.7BFilbur FC-3027OEM 136629

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 diameter	2-3/4" Source values unicel 2-3/4" pleatco 2-3/4"
Length	6" Source values unicel 6" pleatco 5-15/16"
Top cap	/ closed Source values unicel / closed pleatco Closed
Bottom cap	1-1/16" / open Source values unicel 1-1/16" / open pleatco 1 1/16
Pleats	75 Source values unicel 75
Filter area	3.7 sq ft Source values unicel 3.7 pleatco 3.7
Media weight	3 oz Source values unicel 3 pleatco 3

Match the complete printed string. Similar-looking part numbers can describe different end caps or lengths.

Cross-reference equivalents
Brand	Part number	Verification
Unicel	C-2304	cross-checked against 2 sources
Pleatco	PH3.7B	single-source
Filbur	FC-3027	single-source
OEM	136629	single-source

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

Filter and spa fitments
Brand	Model	OEM part	Source
Icon / Keyes Spas	Icon 3.7 sq. ft.	—	pleatco single-source
Icon Spas	—	—	unicel single-source

Records with the same outside diameter and a different length appear first, followed by the closest diameters. End-cap details still need to match.

2-3/4" × 5-1/8"

2-3/4" × 9-3/4"

2-3/4" × 9-3/4"

2-3/4" × 9-3/4"

2-7/8" × 9-3/4"

Outbound retailer searches are provided for convenience; Pool Filter Lab is not the seller.