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Replacement Filter Cartridges
Replacement cartridge sets for the Waterway® Crystal Water in-ground filter line (325, 425, and 525 sq ft). Each tank runs four elements — our 4-packs replace the full set. Match your size in the chart below the products.
No cartridges match these filters.
XLS-718 4Pack
In stockReplaces R173576, PCC105, Unicel C-7471, Filbur FC-1977
XLS-706 4Pack
In stockReplaces PCC-130, C-7472, FC-1978, R173578
XLS-720 4Pack
In stockReplaces PCC-80, C-7470, FC-1976 and R173573
Excel Filters makes replacement cartridges for Waterway® Crystal Water in-ground filters — 325, 425, and 525 sq ft models, four elements per tank. Crystal Water shares elements with the Pentair Clean & Clear Plus family, so the same USA-made Excel 4-pack fits both.
Each Crystal Water tank runs four cartridges — replace all four together for even flow. The elements are shared with the Pentair Clean & Clear Plus family.
Four identical elements per tank. Replace the full set at once — mixing old and new cartridges unbalances flow and shortens the life of the new media. Our 4-packs cover one complete change.
Yes — the Crystal Water 325/425/525 use the same elements as the Clean & Clear Plus 320/420/520 (Unicel C-7470/C-7471/C-7472). Either housing name on your tank leads to the same Excel replacement.
The size is on the tank label (325, 425, or 525). If it is missing, measure one cartridge: the three sizes use clearly different element lengths, and the 817-series part number is stamped on the end cap.
No. Excel Filters cartridges are aftermarket replacements manufactured in the USA to OEM dimensions. They are not affiliated with or endorsed by Waterway or Pentair.
