Sundance 6000-136 Filter Cartridge
Sundance OEM number • 35 sq ft • 5″ OD × 9.25″ long
6000-136 is Sundance's number for this cartridge, not a part you have to buy from Sundance. The filter itself is a 35 square foot cartridge measuring 5 inches across and 9.25 inches long, and Pleatco, Unicel, and Filbur all build it. If you read 6000-136 off an old cartridge or found it in your manual, any of the numbers below drops into the same housing.
Fitment notes
2-1/8 inch open top and bottom. In-line cartridge for Pentair Rainbow Dynamic 35 and Dynamic Series IV DFM/DFML filters. Used by Caldera (74148), the Sundance Tacoma 680 (6000-136), Waterway 35 sq ft top-load housings, and Custom Molded Products top-mount skim filters. Both cross-reference sheets also file it under Bullfrog Spas.
What to buy instead
Replacements for the Sundance 6000-136
Each button searches Amazon for one of the numbers this cartridge is sold under. The OEM version is usually the most expensive of the set and the aftermarket versions are the same physical filter, so it is worth checking all of them before you order.
Every number for this filter
| Brand | Part Number | Type |
|---|---|---|
| Sundance | 6000-136 | The number you searched |
| Pleatco | PRB35-IN | Aftermarket equivalent |
| Unicel | C-4335 | Aftermarket equivalent |
| Filbur | FC-2385 | Aftermarket equivalent |
| Aber Hot Tubs | 03FIL1300 | Other OEM number |
| Caldera | 74148 | Other OEM number |
| Custom Molded Products | 25393 | Other OEM number |
| Pentair | 17-2482 | Other OEM number |
| Pentair | R173431 | Other OEM number |
| Waterway | 817-3501 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PRB35-IN cartridge page. You can also see every 5″ × 9.25″ cartridge if you are checking a measurement rather than a part number.
Equipment that uses this cartridge
Looking for a different model? Browse every Sundance model we cover.
Frequently Asked Questions
What filter replaces the Sundance 6000-136?
The PRB35-IN replaces it directly, and so does every cross-reference for it: C-4335, FC-2385. All of them are the same 35 sq ft cartridge at 5" outer diameter and 9.25" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Aber Hot Tubs 03FIL1300, Caldera 74148, Custom Molded Products 25393, Pentair 17-2482, Pentair R173431, Waterway 817-3501, so those are not different filters either.
Is the Sundance 6000-136 the same as the PRB35-IN?
Yes, physically the same filter. Sundance 6000-136 is an OEM number, meaning it is the code Sundance put on the cartridge that shipped with the equipment. Sundance does not manufacture cartridges. Pleatco, Unicel, and Filbur do, and they sell the identical part under their own numbers at a lower price. Match the dimensions against your old cartridge before ordering and you are covered.
Do I have to buy the Sundance version?
No. Nothing about the housing requires an OEM-branded cartridge, and the warranty on your equipment is not voided by using an aftermarket filter that meets the same spec. The reason to buy OEM is convenience, not performance. The reason not to is price, which is often a meaningful gap for an identical part. What matters is that outer diameter, length, and end-cap style all match.
What size is the Sundance 6000-136?
5 inches in outer diameter, 9.25 inches long, with 35 square feet of filter media. Both measurements need to land within about an eighth of an inch, and the end caps have to match so the cartridge seats correctly when you close the lid. Measure your old one rather than trusting a number that has worn off the label.
Last verified August 2026