Pool Filter Lab

Curated filter system

Sta-Rite Posi-Flo TX50 replacement cartridge

Fits with177007UHD-SR50
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 TX50 cartridge equivalents
UnicelPleatcoFilburDimensionsVerification
UHD-SR50PSR50-4FC-25308-11/16" × 13-5/16"cross-checked against 2 sources

Primary cartridge specifications

Specifications shown for Unicel UHD-SR50. Open its full record for conflicts, notes, and all fitments.

Cartridge specifications
Outside diameter8-11/16"
Source values
  • unicel 8-11/16"
  • pleatco 8-5/8"
Length13-5/16"
Source values
  • unicel 13-5/16"
  • pleatco 13-1/4"
Top cap4-3/16" / open
Source values
  • unicel 4-3/16" / open
  • pleatco 4 1/8
Bottom cap4-3/16" / open w/ 12 concentric slots
Source values
  • unicel 4-3/16" / open w/ 12 concentric slots
  • pleatco 4 1/8
Filter area52 sq ft
Source values
  • unicel 52
  • pleatco 50

Full record: Unicel UHD-SR50. Cross-references include PSR50-4FC-2530

When the model label is missing

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

Measure the cartridge or search by dimensions.