Waterway Filter Cartridges: Darlly Replacements
Darlly replacement cartridges for 23 Waterway filter models. Each row shows the filter, how many cartridges it takes, the OEM cartridge number, the Darlly part, and the Unicel, Pleatco and Filbur equivalents.
| Filter | Darlly | Per filter | Size | OEM cartridge | Unicel | Pleatco | Filbur |
|---|---|---|---|---|---|---|---|
| Rainbow / Pentair Dynamic Series IV DFM/DFML 35; Waterway 35 in-line | 40353 | 1 | 4-15/16" x 9-1/4" | R173431, 17-2482, 817-3501 | C-4335 | PRB35-IN (now ULTRA-S7) | FC-2385 |
| Waterway Teleweir 35 | 40355 | 1 | 4-15/16" x 9-1/4" | 817-4035 | 4CH-935 | PWW35L | FC-0170 |
| Rainbow / Pentair Dynamic Series I RDC-50, II & III RTL/RCF-50, IV DFM/DFML; Waterway 50 in-line | 40506 | 1 | 4-15/16" x 13-5/16" | R173434, 17-2380, RTL-50, 817-5000, 6540-471 | C-4950 | PRB50-IN (now ULTRA-S5) | FC-2390 |
| Waterway Teleweir 50 | 40508U | 1 | 4-15/16" x 13-1/2" | 817-4050 | 4CH-949 | PWW50L | FC-0172 |
| Waterway 100; Cal Spas | 41001 | 1 | 4-15/16" x 23-5/8" | 817-1000 | C-4995 | PCAL100 (discontinued) | FC-2940 |
| Rainbow / Pentair Dynamic Series I RDC-25, II & III RTL/RCF-25, IV DFM/DFML-25; Waterway 25 in-line | 42513 | 1 | 4-15/16" x 13-5/16" | R173429, 17-2327, 817-2500 | C-4326 | PRB25-IN (now ULTRA-S5) | FC-2375 |
| Waterway Teleweir 25 | 42522 | 1 | 4-15/16" x 13-1/2" | 817-4025 | 4CH-926 | PWW25L | FC-0168 |
| Waterway Front Access Skim Filter 50 | 60401 | 1 | 6" x 8-1/4" | 817-0050, 03FIL1400 | 6CH-940 | PWW50P3, ULTRA-S13 | FC-0359 |
| Waterway Front Access Skim Filter 100 (cartridges side by side) | 60401 | 2 | 6" x 8-1/4" | 817-0050 | 6CH-940 | PWW50P3, ULTRA-S13 | FC-0359 |
| Waterway Crystal Water 325 | 70804 | 4 | 7" x 20" | 817-0081 | C-7470 | PCC80 (now ULTRA-A5) | FC-1976 |
| Waterway Crystal Water 425 | 71053 | 4 | 7" x 26-1/16" | 817-0106 | C-7471 | PCC105 (now ULTRA-A6) | FC-1977 |
| Waterway Crystal Water 525 | 71252 | 4 | 7" x 32-1/16" | 817-0131, 817-0143 | C-7472 | PCC130 (now ULTRA-A7) | FC-1978 |
| Waterway Clearwater II 75; Pro-Clean 75 | 80755 | 1 | 8-15/16" x 17-3/8" | 817-0075N, 817-0075P | C-8411 | PA76 (now ULTRA-B6) | FC-1255 |
| Waterway Clearwater II 100; Pro-Clean 100 | 80951 | 1 | 8-15/16" x 17-3/8" | 817-0100N, 817-0100P | C-8409 | PA90 (now ULTRA-B6) | FC-1292 |
| Waterway Clearwater II 125; Pro-Clean 125 with the 23-5/16" cartridge (817-0125N) | 81202 | 1 | 8-15/16" x 23-5/16" | 817-0125N | C-8412 | PA120 (now ULTRA-B2) | FC-1293 |
| Waterway Clearwater II 150; Pro-Clean 150 with the 23-5/16" cartridge (817-0150N) | 81502 | 1 | 8-15/16" x 23-5/16" | 817-0150N | C-8414 | PWWCT150 (now ULTRA-B3) | FC-1287 |
| Sta-Rite Posi-Clear PXC-125 (150 sq ft element); Waterway Pro-Clean 150 with the 28-3/16" cartridge (817-0150P) | 81504 | 1 | 8-15/16" x 28-3/16" | 25230-0150S, 817-0150P | C-8416 | PWWPC150B (now ULTRA-B5) | FC-2576 |
| Waterway Pro-Clean 175 | 81756 | 1 | 8-15/16" x 28-3/16" | 817-0175P | C-8417 | PA175 (now ULTRA-B4) | FC-1294 |
| Waterway Clearwater II 200 | 82001 | 1 | 8-15/16" x 23-5/16" | 817-0200N | C-8419 | PWWCT200 (now ULTRA-B10) | FC-1288 |
| Waterway Pro-Clean 200 (in-ground) | 82002 | 1 | 8-15/16" x 28-3/16" | 817-0200P | C-8420 | PWWPC200 (now ULTRA-B4) | FC-1211 |
| Waterway Clearwater 75 (original coreless); Rec Warehouse 75 | 90752 | 1 | 9-15/16" x 13-5/16" | 817-0075, 111831 | C-9401 | PWW75 | FC-2960 |
| Waterway Clearwater 100 (original coreless); Rec Warehouse 100 | 91002 | 1 | 9-15/16" x 19-5/16" | 817-0100, 111832 | C-9402 | PWW100 | FC-2965 |
| Waterway Eco-Kleer 200 | 92003 | 1 | 9-15/16" x 23-5/16" |
Other brands
Hayward29 filtersPentair26 filtersJandy10 filtersSta-Rite15 filtersRainbow6 filtersIntex, Aqua Leisure and Coleco2 filtersSundance Spas6 filtersJacuzzi5 filtersHot Spring (Watkins)6 filtersCaldera Spas3 filtersBullfrog Spas4 filtersArtesian Spas4 filtersCal Spas3 filtersMarquis Spas2 filtersRec Warehouse and Leisure Bay3 filtersFreeflow Spas2 filtersSpa top-load and skimmer cartridges9 filtersD.E. filter grids5 filtersPureStream prefilters4 filters
Questions
- Which Darlly cartridge fits my Waterway filter?
- Find your filter model in the table above. The Darlly column is the replacement cartridge, and "Per filter" is how many to order for a full set. You can also search any Waterway cartridge number in the box above.
- What if my filter is not listed?
- Search the part number printed on your old cartridge, or measure its outside diameter and length and use the measurement search. Darlly makes over 600 cartridge sizes.
Where to buy Darlly cartridges
Pool and spa businesses in Florida, Georgia, South Carolina, Alabama, Mississippi, Louisiana and Texas order through their Grit Game rep. Everywhere else, contact Darlly Filtration directly.
Cross-reference checked October 21, 2026 against Unicel's 2026 Replacement Guide, Pleatco's catalog (updated September 2025), filbur.com and darllyfilter.com. A competitor number is listed only when that brand's own data pairs it with the same cartridge size. Always compare the size and end caps of your old cartridge before ordering.
Brand names and part numbers are trademarks of their respective owners and are shown only to identify compatible replacements. Darlly Filtration is not affiliated with or endorsed by them. Cross-reference by The Grit Game, Darlly's sales agency.