Curated filter system

Sta-Rite Posi-Flo TX35 replacement cartridge

Fits withUHD-SR35

cross-checked against 2 sources

Which cartridge fits?

The curated mapping points to the cartridge records below. Equivalent brands share the same verified dimensions where sources agree.

Sta-Rite Posi-Flo TX35 cartridge equivalents
Unicel	Pleatco	Filbur	Dimensions	Verification
UHD-SR35	PSR35-4	FC-2520	8-11/16" × 9-3/4"	cross-checked against 2 sources

Specifications shown for Unicel UHD-SR35. Open its full record for conflicts, notes, and all fitments.

Cartridge specifications
Outside diameter	8-11/16" Source values unicel 8-11/16" pleatco 8-5/8"
Length	9-3/4" Source values unicel 9-3/4" pleatco 9-7/16"
Top cap	4-3/16" / open Source values unicel 4-3/16" / open pleatco 4 1/8
Bottom cap	4-3/16" / open w/ 12 concentric slots Source values unicel 4-3/16" / open w/ 12 concentric slots pleatco 4 1/8
Filter area	37 sq ft Source values unicel 37 pleatco 35

Full record: Unicel UHD-SR35. Cross-references include PSR35-4FC-2520

Measure outside diameter and end-to-end length, then compare the top and bottom openings. Manufacturer specifications override any cross-reference.