Cartridge record

Unicel C-8399

Name: Unicel C-8399 filter cartridge
Brand: Unicel
SKU: C-8399

Also sold asPleatco PCD100WFilbur FC-3965OnCore OC-816AOEM 1039607

cross-checked against 3 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	8" Source values unicel 8" pleatco 8-1/16"
Length	16-1/2" Source values unicel 16-1/2" pleatco 16-1/16"
Top cap	/ semi-circular handle Source values unicel / semi-circular handle pleatco Handle
Bottom cap	3-5/8" / open w/ lip seal Source values unicel 3-5/8" / open w/ lip seal pleatco 3 9/16
Pleats	259 Source values unicel 259
Filter area	100 sq ft Source values unicel 100 pleatco 100
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-8399	cross-checked against 3 sources
Pleatco	PCD100W	cross-checked against 2 sources
Filbur	FC-3965	single-source
OnCore	OC-816A	single-source
OEM	1039607	single-source

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

Filter and spa fitments
Brand	Model	OEM part	Source
Caldera Spas	Caldera 100	—	pleatco single-source
Caldera Spas	—	1039607	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.

8" × 15-1/2"

8" × 18"

8" × 18-1/16"

8" × 13"

8" × 12-3/4"

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