Pool Filter Lab

Curated filter system

Sta-Rite Posi-Flo TX100 replacement cartridge

Fits with177009UHD-SR100
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 TX100 cartridge equivalents
UnicelPleatcoFilburDimensionsVerification
UHD-SR100PSR100-4FC-25508-11/16" × 25-11/16"cross-checked against 2 sources

Primary cartridge specifications

Specifications shown for Unicel UHD-SR100. Open its full record for conflicts, notes, and all fitments.

Cartridge specifications
Outside diameter8-11/16"
Source values
  • unicel 8-11/16"
  • pleatco 8-3/4"
Length25-11/16"
Source values
  • unicel 25-11/16"
  • pleatco 25-7/8"
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 area102 sq ft
Source values
  • unicel 102
  • pleatco 100

Full record: Unicel UHD-SR100. Cross-references include PSR100-4FC-2550

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.