Cartridge record

Unicel 4CH-35

Name: Unicel 4CH-35 filter cartridge
Brand: Unicel
SKU: 4CH-35

Also sold asPleatco PTL35PPleatco PTL35P4Filbur FC-0161OnCore OC-415AOEM 6540-486OEM 31382

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	4-5/8" Source values unicel 4-5/8" pleatco 4-7/8"
Length	16" Source values unicel 16" pleatco 15"
Top cap	/ molded cone handle Source values unicel / molded cone handle pleatco Handle
Bottom cap	/ 1-1/2” male thread/MPT Source values unicel / 1-1/2” male thread/MPT pleatco PAD AD
Pleats	145 Source values unicel 145
Filter area	35 sq ft Source values unicel 35 pleatco 35
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	4CH-35	cross-checked against 3 sources
Pleatco	PTL35P	single-source
Pleatco	PTL35P4	single-source
Filbur	FC-0161	single-source
OnCore	OC-415A	single-source
OEM	6540-486	single-source
OEM	31382	single-source

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

Filter and spa fitments
Brand	Model	OEM part	Source
Hot Springs Spas	—	31382	unicel single-source
Sundance Spas	Watkins Hot Spring Spas	—	pleatco single-source
Sundance Spas	—	6540-486	unicel single-source
Unicel	35 sq.ft. top load	—	unicel single-source
Watkins / Hot Springs Spas	Watkins Hot Spring Spas	—	pleatco single-source