PCS75N / C-8475 / FC-3320
75 sq ft replacement filter cartridge • 8″ OD × 13″ long
Coleman and Maax spas share filtration, and both use this 75-square-foot cartridge. It has an unusual bottom: a 2-inch male slip fitting rather than the threads or plain openings you see on most spa filters. The top is a standard 2-1/8-inch opening. Part numbers to match include Coleman/Maax 100594, 3301-2262, and 17513, and it crosses to Unicel C-8475 and Filbur FC-3320. The slip-fit base is specific to these housings, so this isn't a cartridge you can swap a same-size element into. The fitting has to match. Pull your old one and check that bottom connection first.
Compare on Amazon
PCS75N 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 | PCS75N | Primary |
| Unicel | C-8475 | Equivalent |
| Filbur | FC-3320 | Equivalent |
| OEM | Coleman/Maax 100594 | Original Equipment |
| OEM | Coleman/Maax 3301-2262 | Original Equipment |
| OEM | Coleman/Maax 17513 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Hot Tubs & Spas
The PCS75N (or any of its cross-references) fits these spa models. Cartridge sizing occasionally shifted between model years, so it's worth confirming against your owner's manual or the cartridge label.
| Brand | Model |
|---|---|
| Coleman | Series 7000 |
| Maax | Series 7000 |
Frequently Asked Questions
What are the dimensions of the PCS75N?
The PCS75N is 8 inches in outer diameter, 13 inches long, with an open top and an open bottom. Total filtration area is 75 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 PCS75N?
PCS75N is the same physical cartridge as C-8475, FC-3320, plus OEM versions like Coleman/Maax 100594, Coleman/Maax 3301-2262, Coleman/Maax 17513. Same dimensions (8" × 13"), same open top, same open 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 100594 the same filter as the PCS75N?
Yes. Coleman/Maax 100594 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 100594 (along with Coleman/Maax 3301-2262, Coleman/Maax 17513) and PCS75N, C-8475, FC-3320 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 PCS75N?
75 sq ft is a lot of media for a hot tub, so the PCS75N tends to outlast the small-format spa cartridges. It shows up most often in Coleman tubs. Two adults soaking a couple times a week can usually get 18 to 24 months out of one. Monthly hose rinses and a quarterly overnight soak stretch that further. Replace it when the pleats won't rinse clean or pressure starts climbing in a way soaking can't fix.
How do I clean the PCS75N?
The PCS75N 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 PCS75N?
The PCS75N is compatible with: Coleman Series 7000, Maax Series 7000. Confirm against your owner's manual or the label inside the filter compartment, since some brands changed cartridge sizing between model years.
Dimensions
Specifications
| Outer Diameter | 8″ |
|---|---|
| Length | 13″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 75 sq ft |
| Primary Brand | Pleatco |
| Part Number | PCS75N |
Fitment notes
2-1/8 inch top opening, 2-inch male slip bottom fitting. Coleman/Maax spas.