Hot tub filter cross-reference
Spa filters are sold under several brands' part numbers for the very same cartridge. Search your number or your tub's brand to find the Pleatco, Unicel, and Filbur equivalents that fit, so you can buy whichever is in stock or cheapest.
Find your part number first. It is printed or molded into the plastic end cap of your cartridge (and often listed in the tub manual). Match that number, or one of its cross-references below, before you order. A filter that is close but not exact will not seal right.
38 cartridges
| Cartridge | Pleatco | Unicel | Filbur | sq ft | Fits | Shop |
|---|---|---|---|---|---|---|
| PSD125-2000 / Sundance Double-End 120 (125 sq ft) | PSD125-2000 | C-8326 | FC-2780 | 125 | Sundance Double End 120 / MicroClean II spas; Sweetwater. Long double-open-end horizontal cartridge | Shop → |
| PCAL60-F2M (75 sq ft Cal Spa Victory / Marquis) | PCAL60-F2M | 5CH-752 | FC-0202 | 75 | Cal Spas (Victory), Marquis Spas; tall screw-in 75 sq ft cartridge (Pleatco labels it as 60/75 SF) | Shop → |
| PCAL75 (75 sq ft Cal Spa / Waterway 75) | PCAL75 | C-4970 | FC-2930 | 75 | Cal Spas and Waterway 75 in-line housings (tall 23-5/8 drop-in cartridge) | Shop → |
| PCD75 (75 sq ft Caldera) | PCD75 | C-7479 | FC-3085 | 75 | Caldera Spas (75 sq ft) using the 7 dia tall drop-in cartridge | Shop → |
| PDO75 (75 sq ft Dimension One) | PDO75 | C-7367 | FC-3059 | 75 | Dimension One Spas (D1) 75 sq ft housings | Shop → |
| PLBS75 (75 sq ft Leisure Bay S2/G2) | PLBS75 | — | — | 75 | Leisure Bay S2/G2 Spa 75 sq ft housings. Pleatco catalog does not publish a Unicel/Filbur for the base PLBS75, confirm by OEM number 817-0015/303433 | Shop → |
| PSD85-2002 / Sundance MicroClean Ultra outer (75 sq ft) | PSD85-2002 | C-8380 | FC-2810 | 75 | Sundance MicroClean / MicroClean Ultra spas (880 series and many 2004-present Sundance models); Sweetwater spas. The outer (large) pleated cartridge of the MicroClean two-part system | Shop → |
| Hot Spring Tri-X ceramic (65 sq ft, set of 3, REUSABLE) | — | — | — | 65 | 1990-present Hot Spring spa models, 1998-2002 Hot Spot, and all Solana X/RX/SX/TX. Reusable ceramic (dishwasher-safe). NO Pleatco/Unicel/Filbur pleated-paper equivalent; only direct OEM ceramic replacements exist | Shop → |
| PWK65 / PWK45N (65 sq ft Watkins/Hot Spring Grandee) | PWK65 | C-8465 | FC-3960 | 65 | Hot Spring Grandee, Classic, Sovereign and similar large Watkins spas; PWK65 is the upgrade replacement for the older PWK45N | Shop → |
| PJW60TL-F2S (60 sq ft Jacuzzi J-300/J-400, handle top SAE) | PJW60TL-F2S | 6CH-960 | FC-2800 | 60 | Jacuzzi Premium J-300 / J-400 series spas (closed/handle-top variant of the 60 sq ft Jacuzzi cartridge) | Shop → |
| PJW60TL-OT-F2S (60 sq ft Jacuzzi J-300/J-400, open-top SAE) | PJW60TL-OT-F2S | 6CH-961 | FC-2715 | 60 | Jacuzzi Premium J-300 and J-400 series; some Sundance J-300 series spas (open-top variant) | Shop → |
| PAE50 (50 sq ft Advantage Electric) | PAE50 | C-4349 | FC-6310 | 50 | Advantage Manufacturing / Advantage Electric and Sonfarrel 50 sq ft drop-in housings | Shop → |
| PBF50 (50 sq ft Bullfrog) | PBF50 | 8CH-950 | FC-0536 | 50 | Bullfrog Spas (50 sq ft short large-diameter cartridge). Pleatco lists PBF35/PBF36/PBF50 for this body | Shop → |
| PCD50 (50 sq ft Caldera, older) | PCD50 | C-7451 | FC-3084 | 50 | Caldera Spas (older 50 sq ft) using the 7 dia drop-in cartridge | Shop → |
| PJ50 (50 sq ft Jacuzzi CFR 50) | PJ50 | C-9650 | FC-1460 | 50 | Jacuzzi CFR 50 cartridge filter tanks (large-diameter); some Kitt pools | Shop → |
| PLBS50 (50 sq ft Leisure Bay / Dynasty) | PLBS50 | C-5345 | FC-2970 | 50 | Leisure Bay, Dynasty Spas, Waterway and Rainbow housings using the 5-5/16 dia drop-in cartridge | Shop → |
| PMT50 (50 sq ft Sonfarrel / Saratoga top-load) | PMT50 | C-4401 | FC-2386 | 50 | Sonfarrel/Martec, Saratoga and similar 50 sq ft top-load drop-in housings | Shop → |
| PPM50 (50 sq ft Marquis / Pacific Marquis 58) | PPM50 | C-5346 | FC-3638 | 50 | Older Marquis Spas / Pacific Marquis 58 with the closed-top, narrow-bottom cartridge | Shop → |
| PPM50SC-F2M (50 sq ft Marquis / Cal Spa Avalon, new style) | PPM50SC-F2M | 5CH-502 | FC-0195 | 50 | Marquis Spas (new style), Cal Spas, Everyday Hot, Tuff Spas TT/TS. Screw-in 50 sq ft cartridge | Shop → |
| PRB50-IN (50 sq ft Rainbow/Dynamic in-line) | PRB50-IN | C-4950 | FC-2390 | 50 | One of the most common drop-in spa cartridges; fits dozens of brands using the Rainbow/Dynamic in-line housing (Dynamic Series IV, DFM/DFML, RTL/RCF, Waterway). Same body as PRB25-IN with twice the pleats | Shop → |
| PTL50P4 (50 sq ft threaded LA/Dynasty/Dimension One handle) | PTL50P4-4 | 4CH-50 | FC-0151 | 50 | Advanced/LA Spas, Dynasty, Dimension One, Addison, Spillway, Florida Whirlpool, common 50 sq ft threaded-handle cartridge | Shop → |
| PVT50W (50 sq ft Vita Spa top-load) | PVT50W | C-8350 | FC-3053 | 50 | Vita Spa top-load 50 sq ft housings (7 x 14-3/4 cartridge). PVT50P shares the body; verify handle vs anti-debris bottom | Shop → |
| PWW50P3 (50 sq ft Waterway front-access skimmer) | PWW50P3 | 6CH-940 | FC-0359 | 50 | Waterway front-access skimmer spas; many 2-5 person hot tubs (Viking, Marquis older, Vita, American Spas, Coleman/Artesian); the single most common screw-in spa filter | Shop → |
| PMA45-2004-R (45 sq ft Master Spas / Freedom / Futura) | PMA45-2004-R | C-8341 | FC-1007 | 45 | Master Spas (newer round Eco-Pur outer), Down East, Freedom and Futura/Strong spas. Note: same C-8341/FC-1007 also cross to the PMA40-2003-R (40 sq ft, 7-7/8 dia), confirm diameter before buying | Shop → |
| PCAL42-F2M (42 sq ft Cal Spa Avalon) | PCAL42-F2M | 5CH-502 | — | 42 | Cal Spas Avalon series; some Tuff Spas. Often substituted by the PPM50SC-F2M body (5CH-502). Filbur direct number not consistently published, confirm by dimensions | Shop → |
| PDO-UF40 (40 sq ft Dimension One) | PDO-UF40 | 4CH-940 | FC-0177 | 40 | Dimension One Spas (D1) 40 sq ft ultrafiltration housings | Shop → |
| PMA40-F2M (40 sq ft Master Spas Eco-Pur round outer) | PMA40-F2M | — | FC-0418 | 40 | Master Spas Eco-Pur round-outer systems; economical single-cartridge substitute for the 3-piece Eco-Pur (outer + mineral inner + standpipe). Unicel equivalent not published | Shop → |
| PMA40L-F2M (40 sq ft Master Spas Twilight) | PMA40L-F2M | 6CH-402 | FC-0317 | 40 | Master Spas Twilight Series (and Healthy Living) hot tubs; one-piece long replacement for the older (pre-2004) Eco-Pur outer+inner | Shop → |
| PSD40 (40 sq ft Sundance 40, castle top) | PSD40 | C-8380 | FC-2810 | 40 | Older Sundance 40 spas with the narrow castle-top cartridge | Shop → |
| PRB37-IN (37.5 sq ft Rainbow/Dynamic in-line) | PRB37-IN | C-4637 | FC-2380 | 37.5 | Drop-in cartridge for spas using the Rainbow/Dynamic in-line housing where a 37.5 sq ft cartridge was specified (Morgan, Catalina and others) | Shop → |
| PRB35-IN (35 sq ft Rainbow/Dynamic in-line) | PRB35-IN | C-4335 | FC-2385 | 35 | Drop-in cartridge for Bullfrog, Vita Spa (Voyager), Canadian Spa, Clearwater, Dynamic Series IV and many spas using the short Rainbow/Dynamic in-line housing | Shop → |
| PWK30 (30 sq ft Watkins/Hot Spring paper) | PWK30 | C-6430 | FC-3915 | 30 | Hot Spring, Hot Spot, Tiger River, Hydropool spas using the 30 sq ft paper cartridge (the pleated-paper alternative to a single Tri-X) | Shop → |
| PDM25 (25 sq ft Dream Maker) | PDM25 | — | — | 25 | Dream Maker Spas (entry-level portable spas). Pleatco does not publish a Unicel/Filbur for the base PDM25, verify by OEM | Shop → |
| PGS25P4 (25 sq ft threaded After Hours/Nemco handle) | PGS25P4 | 4CH-24 | FC-0131 | 25 | After Hours Spas, Nemco, Saratoga, Mountain Meadows/Mist and many small threaded-handle 25 sq ft spas | Shop → |
| PJ25-IN (25 sq ft Jacuzzi CFR 25) | PJ25-IN | C-5625 | FC-1425 | 25 | Jacuzzi CFR 25 cartridge filter housings; some Morgan/older Jacuzzi whirlpool spas | Shop → |
| PJW23 (25 sq ft Jacuzzi Aero/Caressa) | PJW23 | C-5601 | FC-1330 | 25 | Jacuzzi Aero, Caressa, and C/top spas; Apollo Spas; Jacuzzi Brothers / Jacuzzi Whirlpool Bath models | Shop → |
| PRB25-IN (25 sq ft Rainbow/Dynamic in-line) | PRB25-IN | C-4326 | FC-2375 | 25 | Very common drop-in cartridge for many 2-6 person hot tubs (Hot Spring, Jacuzzi, Sundance, Caldera and 80+ brands using the Rainbow/Dynamic in-line housing); same body as PRB50-IN but half the pleats | Shop → |
| Coleman/Bestway Type VI inflatable (2.5 sq ft, OEM-only) | — | — | — | 2.5 | Bestway Lay-Z-Spa (Miami, Vegas, Bali, Paris, Hawaii, Monaco, St. Moritz, Milan, Havana, Cancun, Tahiti) and Coleman SaluSpa inflatable hot tubs. Proprietary inflatable-spa cartridge, no Pleatco/Unicel/Filbur/Darlly cross-reference exists; buy by Type VI / 58323 / 90352E | Shop → |
Cross-references are from the Pleatco, Unicel, and Filbur charts and reputable retailer finders. Always confirm the number on your own cartridge before buying. Last updated 2026-06-13.
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How filter cross-references work
One physical cartridge is sold as a Pleatco number (like PWW50P3), a Unicel number (6CH-940), a Filbur number (FC-0359), a Darlly number, and your tub maker's own OEM part number, all interchangeable. The aftermarket brands (Pleatco, Unicel, Filbur, Darlly) are generally well-made and cheaper than buying the OEM cartridge from the dealer. What matters is matching the size and the fittings exactly: the diameter, length, and the top and bottom openings (a handle or a hole, threaded or open). Get the number right and any of the equivalents will fit; get it wrong and the cartridge will not seat or seal.