Not sure how to measure your filter cartridge?
Check out this guide.
Replacement Filter Cartridges
Match the complete Pentair Rainbow Dynamic model, including DSF, DFM or DFML. DSF 35 uses an XLS-404 pair, supplied as a 2-pack; DFM / DFML 35 uses XLS-418, and the listed 50 models use XLS-408. XLS-511 and XLS-512 replace Rainbow part numbers R173584 and R173600. Confirm the cartridge number and end caps before ordering.
Match your Rainbow filter housing to the right replacement cartridge.
No cartridges match these filters.
XLS-511 • 1-Pack
Low stockReplaces: Rainbow R173584, Pleatco ULTRA-S10, Unicel C-5345, Filbur FC-2970
XLS-408 • 1-Pack
Low stockReplaces: Rainbow R173430, Pleatco ULTRA-S5, Unicel C-4950, Filbur FC-2390
XLS-512 • 15-Pack
Low stockReplaces: Rainbow R173600, Pleatco PLBS75, Unicel C-5374, Filbur FC-2971
XLS-404 • 2-Pack
In stockReplaces: Pleatco PRB17.5SF-PAIR, Unicel C-4401, Filbur FC-2386
XLS-418 • 1-Pack
In stockReplaces: Pentair R173431, Pleatco PRB35-IN, Unicel C-4335, Filbur FC-2385
Shop replacement filter cartridges for Pentair® Rainbow Dynamic 35 and 50 and DSF spa filter systems. Excel Filters cartridges are made in Austin, Texas to OEM dimensions — match your part number or its Pleatco, Unicel, or Filbur cross-reference for a direct fit.
Dynamic IV DSF 35 uses two XLS-404 cartridges; the current product is supplied as a 2-pack. Dynamic IV DFM 35 and DFML 35 use XLS-418. The listed Dynamic 50 models use XLS-408.
DSF and DFM / DFML are different housings. Select the complete model above and verify the cartridge number and end caps before ordering.
No. Excel Filters cartridges are aftermarket replacements engineered to OEM dimensions. They are not affiliated with or endorsed by Pentair unless stated.
Some Rainbow Dynamic sizes are shared with Waterway and Sundance spa systems. Each product page lists every housing and cross-reference the cartridge replaces, so confirm the number before ordering.
Sign up and get $10 off your next filter order, plus product updates, exclusive discounts, and filter care reminders sent straight to your inbox.
New subscribers only. Single-use code, valid for 14 days from the email. Cannot be combined with other discounts.
