Pool Filter Lab

Curated filter system

Hayward C900 / Star-Clear Plus replacement cartridge

Fits withCX900REC-8409
cross-checked against 3 sources

Which cartridge fits?

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

Hayward C900 / Star-Clear Plus cartridge equivalents
UnicelPleatcoFilburDimensionsVerification
C-8409PA90FC-12928-15/16" × 17-3/8"cross-checked against 3 sources

Primary cartridge specifications

Specifications shown for Unicel C-8409. Open its full record for conflicts, notes, and all fitments.

Cartridge specifications
Outside diameter8-15/16"
Source values
  • unicel 8-15/16"
  • pleatco 8-15/16"
Length17-3/8"
Source values
  • unicel 17-3/8"
  • pleatco 17-3/8"
Top cap4" / open w/ molded gasket
Source values
  • unicel 4" / open w/ molded gasket
  • pleatco 4
Bottom cap4" / open w/ molded gasket
Source values
  • unicel 4" / open w/ molded gasket
  • pleatco 4
Filter area90 sq ft
Source values
  • unicel 90
  • pleatco 90

Full record: Unicel C-8409. Cross-references include PA90FC-1292OC-817D

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.