PCS50N / C-8450 / FC-3310 / Coleman/Maax 100593 / Coleman/Maax 3301-2261
50 sq ft replacement filter cartridge • 8.09375″ OD × 8.875″ long
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PCS50N replacements on Amazon
The buttons below pull up Amazon results for each cross-reference part number. Same physical cartridge, different stickers, often different prices. Cross-shop and pick the cheapest option that has solid recent reviews.
Cross-Reference & Interchangeable Part Numbers
| Brand | Part Number | Type |
|---|---|---|
| Pleatco | PCS50N | Primary |
| Unicel | C-8450 | Equivalent |
| Filbur | FC-3310 | Equivalent |
| OEM | Coleman/Maax 100593 | Original Equipment |
| OEM | Coleman/Maax 3301-2261 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Frequently Asked Questions
What are the dimensions of the PCS50N?
The PCS50N is 8.09375 inches in outer diameter, 8.875 inches long, with an open top and a slip-fitting bottom. Total filtration area is 50 square feet. Before ordering, pull your existing cartridge and measure it yourself, or check the label inside the housing. OD and length both have to match within about an eighth of an inch, and the end-cap style needs to match exactly so the cartridge seats properly when the lid closes.
What other part numbers are interchangeable with the PCS50N?
PCS50N is the same physical cartridge as C-8450, FC-3310, plus OEM versions like Coleman/Maax 100593, Coleman/Maax 3301-2261. Same dimensions (8.09375" × 8.875"), same open top, same slip-fitting bottom. The Pleatco, Unicel, and Filbur boxes ship the same media inside, just with different stickers. The only thing to watch is the end-cap style: if a cross-reference has a slightly different cap design, it may not seat right in your housing.
Is the Coleman/Maax 100593 the same filter as the PCS50N?
Yes. Coleman/Maax 100593 is an OEM number, the code the tub or pool builder stamps on the cartridge they ship. The filter itself is made by Pleatco, Unicel, or Filbur, so Coleman/Maax 100593 (along with Coleman/Maax 3301-2261) and PCS50N, C-8450, FC-3310 all point to one interchangeable cartridge. Buy whichever is cheapest with solid recent reviews, and just check that the dimensions match your old cartridge before you order.
How often should I replace the PCS50N?
Most filter cartridges last between 12 and 24 months. Pull the PCS50N every few months for a hose rinse, soak it in cleaner quarterly, and replace it when the pleats are torn, channeling, or won't come clean. Bather load, water chemistry, and how often you actually clean it all matter more than the calendar.
How do I clean the PCS50N?
The PCS50N has open ends on both top and bottom, so water flows straight through. Pull the cartridge from the housing and hose it down. Hit the pleats from above at about a 45-degree angle so water rinses debris out instead of packing it deeper, and work top to bottom while rotating the cartridge. Skip the pressure washer. The high pressure tears or collapses pleats, and once that happens you've lost media that doesn't come back. Every few months (or at every water change, whichever comes first), do a deep clean: overnight soak in a hot tub filter cleaner, then a thorough rinse. If your cartridge has a closed end cap, let it dry before reinstalling so you don't trap moisture inside the cartridge core.
Which hot tubs and spas use the PCS50N?
Pull your existing cartridge and read the part number off the end cap, or check the label inside the filter compartment. That's the most reliable way to confirm compatibility.
Dimensions
Specifications
| Outer Diameter | 8.09375″ |
|---|---|
| Length | 8.875″ |
| Top Type | Open (no end cap) |
| Bottom Type | Slip fitting |
| Filtration Area | 50 sq ft |
| Primary Brand | Pleatco |
| Part Number | PCS50N |
Fitment notes
A 2-1/8 inch open top over a 2 inch male slip fitting, not a threaded bottom. Confirmed through Coleman OEM 100593, which Unicel resolves to the same C-8450 at 8 by 9 inches and 50 sq ft with the same slip fitting. This is the smaller sibling of the PCS75N, which shares the design in a 13 inch body at 75 sq ft. The slip fitting is what separates this generation from the older PCS50, which threads in.