Aber Hot Tubs 03FIL1600 Filter Cartridge
Aber Hot Tubs OEM number • 50 sq ft • 5″ OD × 13.3125″ long
03FIL1600 is Aber Hot Tubs's number for this cartridge, not a part you have to buy from Aber Hot Tubs. The filter itself is a 50 square foot cartridge measuring 5 inches across and 13.3125 inches long, and Pleatco, Unicel, and Filbur all build it. If you read 03FIL1600 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. Drop-in. Jacuzzi J-200 series 2005+, also Caldera Oasis 2002-2009. The 50 sq ft workhorse of the family: replaces Pentair Rainbow Dynamic 50 in-line cartridges (Dynamic Series I through IV), Beachcomber 3005815, Sundance 6540-471, Coleman Spas 100533, and Waterway TWM filter packs. Unicel notes it as the upgrade for 25 sq ft cartridges in the same 13-5/16 inch shell. Both cross-reference sheets also file it under Bullfrog Spas.
What to buy instead
Replacements for the Aber Hot Tubs 03FIL1600
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 |
|---|---|---|
| Aber Hot Tubs | 03FIL1600 | The number you searched |
| Pleatco | PRB50-IN | Aftermarket equivalent |
| Unicel | C-4950 | Aftermarket equivalent |
| Filbur | FC-2390 | Aftermarket equivalent |
| Beachcomber | 3005815 | Other OEM number |
| Caldera | 302005 | Other OEM number |
| Caldera | 73533 | Other OEM number |
| Coleman/Maax | 100533 | Other OEM number |
| Coleman/Maax | 3301-2145 | Other OEM number |
| Custom Molded Products | 25391 | Other OEM number |
| Guardian | 413-212-02 | Other OEM number |
| Jacuzzi | 373045 | Other OEM number |
| Jacuzzi | 373045J | Other OEM number |
| Pentair | 17-2380 | Other OEM number |
| Pentair | R173434 | Other OEM number |
| Sundance | 6540-471 | Other OEM number |
| Waterway | 817-5000 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PRB50-IN cartridge page. You can also see every 5″ × 13.3125″ cartridge if you are checking a measurement rather than a part number.
Equipment that uses this cartridge
Frequently Asked Questions
What filter replaces the Aber Hot Tubs 03FIL1600?
The PRB50-IN replaces it directly, and so does every cross-reference for it: C-4950, FC-2390. All of them are the same 50 sq ft cartridge at 5" outer diameter and 13.3125" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Beachcomber 3005815, Caldera 302005, Caldera 73533, Coleman/Maax 100533, Coleman/Maax 3301-2145, Custom Molded Products 25391, Guardian 413-212-02, Jacuzzi 373045, Jacuzzi 373045J, Pentair 17-2380, Pentair R173434, Sundance 6540-471, Waterway 817-5000, so those are not different filters either.
Is the Aber Hot Tubs 03FIL1600 the same as the PRB50-IN?
Yes, physically the same filter. Aber Hot Tubs 03FIL1600 is an OEM number, meaning it is the code Aber Hot Tubs put on the cartridge that shipped with the equipment. Aber Hot Tubs 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 Aber Hot Tubs 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 Aber Hot Tubs 03FIL1600?
5 inches in outer diameter, 13.3125 inches long, with 50 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