Compatible with Unicel
C-4335
Hot Tub Filter Cartridge, 35 Sq Ft, 4-15/16 x 9-1/4 In., Replacement for Unicel C-4335, Pleatco PRB35-IN, Filbur FC-2385
Also sold as
Your number not here? Send it to us and we'll confirm the match.
OEM numbers listed for fitment identification only.
Specifications
| Compatible brand | Unicel |
|---|---|
| Category | Hot Tub & Spa Filters |
| Lead time | 15–25 days after order confirmation |
- MOQ 50 pcs · samples from 1
- Private label available
- Ships from our factory
Request wholesale quote
One request covers the whole list — no need to send them one by one.
Tiered pricing available above 1,000 pcs · OEM packaging available
Product overview
C-4335 is an aftermarket pleated hot tub filter cartridge, 4-15/16 in. in diameter and 9-1/4 in. long, with 35 sq ft of filter area. Top: open (2-1/8" ID). Bottom: open (2-1/8" ID). Center opening: 2-1/8 in.
It interchanges with Pleatco PRB35-IN and Filbur FC-2385.
Pleatco lists PRB35-IN as discontinued in its 2025-26 catalog and names ULTRA-S7 as the successor. This cartridge keeps the original 4-15/16 x 9-1/4 in. size, so it drops into the same filter housing.
OEM cartridges it replaces: Aber Hot Tubs 03FIL1300; Caldera 74148; CMP 25393; Orca Bay Spas 3501; Pentair Pool Prod R173431; Pentair Pool Prod - Rainbow Plastics 17-2482; Rec Warehouse 303557; Sundance 6000-136.
Before ordering, measure the old cartridge — overall length, outside diameter and both end fittings. Some catalogs quote the length of threaded top-load cartridges with the thread and some without, so a quarter-inch difference between listings is common. We supply spa service companies, dealers and online retailers: MOQ 50 pcs per part, mixed cartons welcome, and single samples to confirm fit before a production order.
Fits these systems
Hot tubs and spas from Aber Hot Tubs, Belize Spas, Bullfrog, Caldera, Clearwater Spas, Coast Mountain Spas, Columbia Spas, Crystal Waters Spas, CMP, Emerald Spas, Great Lakes Home & Resort, Gulf Coast Spas, Hawkeye Spas, Hydro Pool Industries and 15 more.
Not sure it fits? Send us a photo of your part and we'll confirm. Send a photo
Often sourced together
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Fits Pleatco
Hot Tub Filter Cartridge, 42 Sq Ft, 5-3/16 x 12-1/2 In., Replacement for Pleatco PCAL42-F2M
Fits Pleatco
Hot Tub Filter Cartridge, 45 Sq Ft, 8-1/2 x 10-9/16 In., Replacement for Pleatco PWK45N, Filbur FC-3929
Fits Pleatco
Hot Tub Filter Cartridge, 18 Sq Ft, 6-5/8 x 6-1/4 In., Replacement for Pleatco PBF17Sourcing questions
What OEM numbers does C-4335 replace?
POOLPOINT C-4335 is an aftermarket replacement cross-referenced to 03FIL1300, 17-2482, 25393, 303557, 3501, 6000-136, 74148 and 817-3501, plus 5 more listed on this page. Those numbers identify fitment only — the part is manufactured by POOLPOINT, not by Unicel.
Is C-4335 a genuine Unicel part?
No. POOLPOINT manufactures compatible aftermarket replacement parts. We are not affiliated with, sponsored by or endorsed by Unicel; the brand name and OEM numbers are used to identify fitment only.
What is the minimum order quantity for C-4335?
MOQ is 50 pcs per part, and mixed cartons are welcome to reach the order minimum. Samples are a separate case — we supply single pieces so you can confirm fitment before committing to a production run.
C-4335
Hot Tub Filter Cartridge, 35 Sq Ft, 4-15/16 x 9-1/4 In., Replacement for Unicel C-4335, Pleatco PRB35-IN, Filbur FC-2385