PDO75-2000 / C-7367 / FC-3059
75 sq ft replacement filter cartridge • 7.125″ OD × 10.5″ long
Dimension One Spas use a proprietary 'E-Z Lock' filter, and the PDO75-2000 is the 75-square-foot version. It's fitted across a long list of D1 models: the Nautilus, Reflection, Triad, Chairman, Diplomat, Californian, Aurora, and Seville. Dimension One numbers it 1561-00 and 01561-00-A, Aladdin lists it as 17541, and the cross-references are Unicel C-7367 and Filbur FC-3059. D1's filter sizing is fairly consistent within the brand, which makes cross-shopping easy once you've confirmed the E-Z Lock style. As always with D1, the part number molded into your existing cartridge is the fastest way to be certain you're matching the right element.
Compare on Amazon
PDO75-2000 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 | PDO75-2000 | Primary |
| Unicel | C-7367 | Equivalent |
| Filbur | FC-3059 | Equivalent |
| OEM | Dimension One 1561-00 | Original Equipment |
| OEM | Dimension One 01561-00-A | Original Equipment |
| OEM | Aladdin 17541 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Hot Tubs & Spas
The PDO75-2000 (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 |
|---|---|
| Dimension One | Nautilus |
| Dimension One | Reflection |
| Dimension One | Triad |
Frequently Asked Questions
What are the dimensions of the PDO75-2000?
The PDO75-2000 is 7.125 inches in outer diameter, 10.5 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 PDO75-2000?
PDO75-2000 is the same physical cartridge as C-7367, FC-3059, plus OEM versions like Dimension One 1561-00, Dimension One 01561-00-A, Aladdin 17541. Same dimensions (7.125" × 10.5"), 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 Dimension One 1561-00 the same filter as the PDO75-2000?
Yes. Dimension One 1561-00 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 Dimension One 1561-00 (along with Dimension One 01561-00-A, Aladdin 17541) and PDO75-2000, C-7367, FC-3059 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 PDO75-2000?
75 sq ft is a lot of media for a hot tub, so the PDO75-2000 tends to outlast the small-format spa cartridges. It shows up most often in Dimension One 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 PDO75-2000?
The PDO75-2000 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 PDO75-2000?
The PDO75-2000 is compatible with: Dimension One Nautilus, Dimension One Reflection, Dimension One Triad. 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 | 7.125″ |
|---|---|
| Length | 10.5″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 75 sq ft |
| Pleat Count | undefined |
| Primary Brand | Pleatco |
| Part Number | PDO75-2000 |
Fitment notes
Dimension One Spas E-Z Lock filter. Nautilus, Reflection, Triad, Chairman, Diplomat, Californian, Aurora, Seville.