Hot Tub Filter Cartridge, 4-15/16 x 4-5/8 In., Replacement for Unicel C-4401, Pleatco PRB17.5SF-JH-PAIR, Filbur FC-2386

Compatible with Unicel

C-4401

Hot Tub Filter Cartridge, 4-15/16 x 4-5/8 In., Replacement for Unicel C-4401, Pleatco PRB17.5SF-JH-PAIR, Filbur FC-2386

Also sold as

17-260630058206000-134817-3510FC-2386PRB17.5SF-JH-PAIRR173432

Your number not here? Send it to us and we'll confirm the match.

OEM numbers listed for fitment identification only.

Specifications

Compatible brandUnicel
CategoryHot Tub & Spa Filters
Lead time15–25 days after order confirmation
  • MOQ 50 pcs · samples from 1
  • Private label available
  • Ships from our factory

Request wholesale quote

or

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-4401 is an aftermarket pleated hot tub filter cartridge, 4-15/16 in. in diameter and 4-5/8 in. long. Top: open (2-1/8" ID). Bottom: open (2-1/8" ID). Center opening: 2-1/8 in.

It interchanges with Pleatco PRB17.5SF-JH-PAIR and Filbur FC-2386.

Pleatco lists PRB17.5SF-JH-PAIR as discontinued in its 2025-26 catalog. This cartridge keeps the original 4-15/16 x 4-5/8 in. size, so it drops into the same filter housing.

OEM cartridges it replaces: Beachcomber 3005820; Pentair Pool Prod R173432; Pentair Pool Prod - Rainbow Plastics 17-2606; Sundance 6000-134; Waterway 817-3510.

Fitment notes: 2 cartridges per set with stick handle. Sundance: Requires one C-4401 and one C-4405 for 45 sq.ft. total.

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 Apollo Spas, Aqua Tech Spas, Beachcomber, Canspa Mfg., Catalina Spas, Clearwater Spas, Diamond Back Spas, Discovery Spas, Dynasty Spas, Esther Williams, Freedom Spas, Hydro Spa, Legend Spas, Lifestyle Spas and 6 more.

Not sure it fits? Send us a photo of your part and we'll confirm. Send a photo

Sourcing questions

What OEM numbers does C-4401 replace?

POOLPOINT C-4401 is an aftermarket replacement cross-referenced to 17-2606, 3005820, 6000-134, 817-3510, FC-2386, PRB17.5SF-JH-PAIR and R173432. Those numbers identify fitment only — the part is manufactured by POOLPOINT, not by Unicel.

Is C-4401 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-4401?

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.

Factory directWe manufacture ourselves. No trading company in between.
Built to lastEngineering materials matched to OEM specs or better.
Cross-referencedEvery part mapped to the OEM numbers it replaces.
Bulk & container supplyMOQ from 50 pcs. Mixed cartons welcome.
3D fitment modelsVerify threads and ports before you commit.

C-4401

Hot Tub Filter Cartridge, 4-15/16 x 4-5/8 In., Replacement for Unicel C-4401, Pleatco PRB17.5SF-JH-PAIR, Filbur FC-2386

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