Waterway 817-0200NB Filter Cartridge
Waterway OEM number • 200 sq ft • 8.9375″ OD × 21″ long
817-0200NB is Waterway's number for this cartridge, not a part you have to buy from Waterway. The filter itself is a 200 square foot cartridge measuring 8.9375 inches across and 21 inches long, and Pleatco, Unicel, and Filbur all build it. If you read 817-0200NB off an old cartridge or found it in your manual, any of the numbers below drops into the same housing.
Fitment notes
Waterway Clearwater II 200 sq ft filter.
What to buy instead
Replacements for the Waterway 817-0200NB
Each button searches Amazon for one of the numbers this cartridge is sold under. The OEM version is usually the most expensive of the set and the aftermarket versions are the same physical filter, so it is worth checking all of them before you order.
Every number for this filter
| Brand | Part Number | Type |
|---|---|---|
| Waterway | 817-0200NB | The number you searched |
| Pleatco | PWWCT200 | Aftermarket equivalent |
| Unicel | C-8419 | Aftermarket equivalent |
| Filbur | FC-1288 | Aftermarket equivalent |
| Clearwater | 2 200 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PWWCT200 cartridge page. You can also see every 8.9375″ × 21″ cartridge if you are checking a measurement rather than a part number.
Equipment that uses this cartridge
Looking for a different model? Browse every Waterway model we cover.
Frequently Asked Questions
What filter replaces the Waterway 817-0200NB?
The PWWCT200 replaces it directly, and so does every cross-reference for it: C-8419, FC-1288. All of them are the same 200 sq ft cartridge at 8.9375" outer diameter and 21" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Clearwater 2 200, so those are not different filters either.
Is the Waterway 817-0200NB the same as the PWWCT200?
Yes, physically the same filter. Waterway 817-0200NB is an OEM number, meaning it is the code Waterway put on the cartridge that shipped with the equipment. Waterway does not manufacture cartridges. Pleatco, Unicel, and Filbur do, and they sell the identical part under their own numbers at a lower price. Match the dimensions against your old cartridge before ordering and you are covered.
Do I have to buy the Waterway version?
No. Nothing about the housing requires an OEM-branded cartridge, and the warranty on your equipment is not voided by using an aftermarket filter that meets the same spec. The reason to buy OEM is convenience, not performance. The reason not to is price, which is often a meaningful gap for an identical part. What matters is that outer diameter, length, and end-cap style all match.
What size is the Waterway 817-0200NB?
8.9375 inches in outer diameter, 21 inches long, with 200 square feet of filter media. Both measurements need to land within about an eighth of an inch, and the end caps have to match so the cartridge seats correctly when you close the lid. Measure your old one rather than trusting a number that has worn off the label.
Data updated July 2026