PAP100 / C-9410 / FC-0686
100 sq ft replacement filter cartridge • 10.0625″ OD × 23.625″ long
Pentair's Clean & Clear 100 and Predator 100 filters use this big single cartridge. It's 100 square feet, a full 10 inches in diameter with a 6-inch center hole, standing about 23-1/2 inches tall. These are single-cartridge tanks, so there's just one element to pull and replace. Pentair numbers it R173214 and 572131, and the cross-references are Unicel C-9410 and Filbur FC-0686. Don't confuse the Clean & Clear, a single cartridge, with the Clean & Clear Plus, a four-cartridge system that uses the much narrower PCC-series elements. The '100' here means 100 square feet in one cartridge, not a four-pack.
Compare on Amazon
PAP100 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 | PAP100 | Primary |
| Unicel | C-9410 | Equivalent |
| Filbur | FC-0686 | Equivalent |
| OEM | Pentair R173214 | Original Equipment |
| OEM | Pentair 572131 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Pool Filter Systems
| Brand | Model |
|---|---|
| Pentair | Clean & Clear 100 |
| Pentair | Predator 100 |
Frequently Asked Questions
What are the dimensions of the PAP100?
The PAP100 is 10.0625 inches in outer diameter, 23.625 inches long, with an open top and an open bottom. Total filtration area is 100 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 PAP100?
PAP100 is the same physical cartridge as C-9410, FC-0686, plus OEM versions like Pentair R173214, Pentair 572131. Same dimensions (10.0625" × 23.625"), 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 Pentair R173214 the same filter as the PAP100?
Yes. Pentair R173214 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 Pentair R173214 (along with Pentair 572131) and PAP100, C-9410, FC-0686 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 PAP100?
The PAP100 holds 100 sq ft of media, so it has a healthy buffer before it clogs for good. Plan on 18 to 24 months in a normal residential pool. The pressure gauge is the honest signal here: an 8 to 10 psi rise over the clean pressure that a soak can't reverse means it's time. Channeling, tears, or fibers that won't rinse clean are the other reasons to swap it early.
How do I clean the PAP100?
The PAP100 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, give it a deeper clean: soak in a dedicated pool filter cleaner per the product's dwell time, then rinse it down completely before reinstalling. Keeping a spare cartridge on the shelf is genuinely worth it. You swap, run the soak overnight, and the pool keeps filtering.
Which hot tubs and spas use the PAP100?
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 | 10.0625″ |
|---|---|
| Length | 23.625″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 100 sq ft |
| Primary Brand | Pleatco |
| Part Number | PAP100 |
Fitment notes
6-inch center hole. Pentair Clean & Clear 100, Predator 100.