Not sure how to measure your filter cartridge?
Check out this guide.
Replaces CX900RE, 817-100, PA-90, C-8409
Fits & replaces
This Excel Filters cartridge (XLS-800) is a direct-fit replacement for Hayward CX900RE, Waterway ProClean Plus 100, and Sta-Rite Posi-Clear PXC-95 filter systems, cross-referenced with Pleatco PA90, Unicel C-8409, and Filbur FC-1292. Confirm the part number on your current cartridge — or its diameter, length, and end caps — before ordering.
See the full compatibility list (20) →
Pleatco / Unicel / Filbur equivalents on the cross-reference chart →
Built to OEM dimensions for Hayward CX900RE, Waterway ProClean Plus 100, and Sta-Rite Posi-Clear PXC-95 cartridge filter systems, this replacement matches the original cartridge geometry, end-cap style, and media surface area — without the OEM markup. It directly replaces aftermarket Pleatco PA90, Unicel C-8409, and Filbur FC-1292 part numbers — the full cross-reference list is in the Compatibility tab. Every cartridge is manufactured in our Austin, TX facility, ships free, and is backed by the Excel Filters Perfect Fit Guarantee on its listed cross-references.
The XLS-800 1PACK replacement cartridge is engineered for Hayward and built for dependable day-to-day filtration performance. Each cartridge is sized at 8 15/16" diameter x 17 3/8" length, with 4" ID w/ Gasket top and 4" ID w/ Gasket bottom end caps for direct-fit installation with no housing modifications.
Measure your old cartridge cap-to-cap. A variance of ⅛" is normal — anything larger likely means a different housing model.
Match your filter housing below, click any part number to verify the fit, or paste your existing part number into the search box.
Filter housings and systems this cartridge fits
OEM and competitor cartridge part numbers this product replaces
Can't find your part number? Look it up on the full pool filter cartridge cross-reference chart.
The Excel Filters XLS-800 replaces Hayward CX900RE, and aftermarket equivalents Pleatco PA90, Unicel C-8409, Filbur FC-1292.
It fits Waterway Clearwater II 100, Waterway ProClean 100; Hayward StarClear Plus C900; Sta-Rite Posi-Clear PXC-95. If your housing is not listed, match the part number stamped on your current cartridge on our cross-reference chart.
8 15/16" diameter, 17 3/8" long, 90 ft² of media (end caps — top: 4" Open End, bottom: 4" Open End). Measure your old cartridge before ordering if you are unsure of the part number.
No. The XLS-800 is an independently manufactured replacement cartridge, made in the USA by Excel Filters and built to match the Hayward CX900RE specification. Hayward is a trademark of its owner, used only to show compatibility.
Most pool and spa cartridges last 1–2 seasons with regular rinsing. Replace it when cleaning no longer restores flow, the pleats fray, or the end caps crack.
XLS-801 1Pack
In stockReplaces CX760RE, PA-76, C-8411
XLS-802 1Pack
In stockReplaces CX1200RE, PA-120, C-8412
XLS-718 4Pack
In stockReplaces R173576, PCC105, Unicel C-7471, Filbur FC-1977
XLS-722 4Pack
In stockReplaces CX875RE, CX880XRE, PA106, C-7488, FC-1226
