Waterway Clearwater II Filter Cartridges

The size is the number on your filter tank (75, 100, 125, 150 or 200). If the label is missing, use the part number printed on your old cartridge.

Measuring only narrows it to a size group: the 75 and 100 cartridges are both 17 3/8" long and the 125, 150 and 200 cartridges are all 23 5/16" long.

The easiest way to tell is by the cartridge part number printed on your existing filter.

Waterway® ClearWater II cartridges typically use 817-series part numbers with an “N” suffix. ProClean cartridges use different part numbers and end-cap configurations.

If you are unsure, compare your existing cartridge dimensions and part number before ordering.

No. Each size has its own cartridge: 75 takes the XLS-801, 100 the XLS-800, 125 the XLS-802, 150 the XLS-822 and 200 the XLS-847.

Several sizes share a length (17 3/8" for the 75 and 100; 23 5/16" for the 125, 150 and 200), so order by tank size and cartridge part number, and use the measurements and end caps only as a check.

Waterway® ClearWater II systems use one cartridge per housing.

Excel Filters single replacement cartridges allow you to replace the worn cartridge while maintaining the original filtration design of your ClearWater II system.

Yes. Excel Filters manufactures aftermarket replacement cartridges designed to fit compatible Waterway® ClearWater II filter systems.

Our cartridges are engineered to match the original cartridge specifications, including dimensions, end-cap style, and filtration area, regardless of the original cartridge manufacturer.

Excel Filters cartridges are aftermarket replacement cartridges manufactured in Austin, Texas and engineered to match compatible Waterway® cartridge specifications, including fit, dimensions, and filtration area.

Excel Filters is an independent manufacturer and is not affiliated with or endorsed by Waterway® unless specifically stated.

Excel Filters manufactures replacement cartridges in the USA using premium filtration media and engineered components designed for reliable fit and performance.

By selling factory-direct, Excel Filters provides a high-quality replacement option without the additional distributor and retail markups commonly associated with manufacturer-branded cartridges.

All four are aftermarket replacements built to the same OEM cartridge dimensions, media area, and flow — the cartridge that fits your housing is the same size whichever brand you choose.

The difference is where they come from: Excel Filters designs and manufactures every cartridge in Austin, Texas and sells factory-direct, without the added distributor markup. Every product page lists the matching Pleatco, Unicel, and Filbur cross-reference numbers so you can match one to one before you order.