Pool Filter Lab

Cartridge record

Unicel 4CH-50

Also sold asPleatco PTL50PPleatco PTL50P4Filbur FC-0151OnCore OC-414BOEM 1561-05

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 diameter4-5/8"
Source values
  • unicel 4-5/8"
  • pleatco 4-7/8"
Length14-3/4"
Source values
  • unicel 14-3/4"
  • 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
Pleats225
Source values
  • unicel 225
Filter area50 sq ft
Source values
  • unicel 50
  • pleatco 50
Media weight3 oz
Source values
  • unicel 3
  • pleatco 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
Unicel4CH-50cross-checked against 3 sources
PleatcoPTL50Psingle-source
PleatcoPTL50P4single-source
FilburFC-0151single-source
OnCoreOC-414Bsingle-source
OEM1561-05single-source

Known equipment fits

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

Filter and spa fitments
BrandModelOEM partSource
Addison SpasAdvanced/LA Spas—pleatco single-source
Addison Spas——unicel single-source
Advanced Spa Design——unicel single-source
American Classic SpasAdvanced/LA Spas—pleatco single-source
American Classic Spas——unicel single-source
Aqua Tech SpasAdvanced/LA Spas—pleatco single-source
Aqua Tech Spas——unicel single-source
Dimension One SpasAdvanced/LA Spas—pleatco single-source
Dimension One Spas—1561-05unicel single-source
Dynasty SpasAdvanced/LA Spas—pleatco single-source
Dynasty Spas——unicel single-source
Florida Whirlpool SpasAdvanced/LA Spas—pleatco single-source
Florida Whirlpool——unicel single-source
LA Spas / Advanced Spa DesignAdvanced/LA Spas—pleatco single-source
Nemco SpasAdvanced/LA Spas—pleatco single-source
Nemco——unicel single-source
OPU Spas/Great Northern EngineeringAdvanced/LA Spas—pleatco single-source
OpuSpas——unicel single-source
Unicel50 sq.ft. top load—unicel 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.

4CH-940

4-5/8" × 15"

cross-checked against 2 sources

4CH-35

4-5/8" × 16"

cross-checked against 3 sources

C-4440

4-5/8" × 16-3/4"

cross-checked against 2 sources

4CH-934

4-5/8" × 12-1/2"

single-source

4CH-950

4-5/8" × 12"

cross-checked against 2 sources

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