PJAN85 / C-7459 / FC-0800
85 sq ft replacement filter cartridge • 7″ OD × 26.9375″ long
Jandy's CL340 and CV340 cartridge filters hold four of these, for 340 square feet total. Each PJAN85 is an 85-square-foot element, 7 inches across and about 27 inches tall. The Jandy CV-series is one of the easier cartridge filters to service. A band clamp releases the top tank and the cartridges lift straight out. Even so, replace all four as a set. Jandy and Zodiac number it R0554500, and the cross-references are Unicel C-7459 and Filbur FC-0800. Check whether your tank is the 340 or the larger 460 or 580 model before you buy, since the four Jandy sizes use progressively taller or fatter cartridges.
Compare on Amazon
PJAN85 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 | PJAN85 | Primary |
| Unicel | C-7459 | Equivalent |
| Filbur | FC-0800 | Equivalent |
| OEM | Jandy/Zodiac R0554500 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Pool Filter Systems
Frequently Asked Questions
What are the dimensions of the PJAN85?
The PJAN85 is 7 inches in outer diameter, 26.9375 inches long, with an open top and an open bottom. Total filtration area is 85 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 PJAN85?
PJAN85 is the same physical cartridge as C-7459, FC-0800, plus OEM versions like Jandy/Zodiac R0554500. Same dimensions (7" × 26.9375"), 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 Jandy/Zodiac R0554500 the same filter as the PJAN85?
Yes. Jandy/Zodiac R0554500 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 Jandy/Zodiac R0554500 and PJAN85, C-7459, FC-0800 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 PJAN85?
At 85 sq ft the PJAN85 runs smaller than the big 100-plus sq ft pool cartridges, so it has less buffer between cleanings. Expect 12 to 18 months in normal use, less if the pool sees heavy traffic or the chemistry drifts. Watch the gauge: when pressure sits 8 to 10 psi above the clean starting point and a soak won't drop it, put in a fresh one.
How do I clean the PJAN85?
The PJAN85 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 PJAN85?
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 | 7″ |
|---|---|
| Length | 26.9375″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 85 sq ft |
| Primary Brand | Pleatco |
| Part Number | PJAN85 |
Fitment notes
3-inch top and bottom openings. Jandy CL340 / CV340 (4 cartridges, 340 sq ft total).