Hot Tub Filter Cartridge, 45 Sq Ft, 8-1/2 x 10-9/16 In., Replacement for Pleatco PWK45N, Filbur FC-3929

Compatible with Pleatco

PWK45N

Hot Tub Filter Cartridge, 45 Sq Ft, 8-1/2 x 10-9/16 In., Replacement for Pleatco PWK45N, Filbur FC-3929

Also sold as

31114FC-3929

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

OEM numbers listed for fitment identification only.

Specifications

Compatible brandPleatco
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

PWK45N is an aftermarket pleated hot tub filter cartridge, 8-1/2 in. in diameter and 10-9/16 in. long, with 45 sq ft of filter area. Top: Open, 3" ID. Bottom: Open, 3" ID. Center opening: 3 in.

It interchanges with Filbur FC-3929.

OEM cartridges it replaces: Watkins 31114.

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 Watkins.

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

Sourcing questions

What OEM numbers does PWK45N replace?

POOLPOINT PWK45N is an aftermarket replacement cross-referenced to 31114 and FC-3929. Those numbers identify fitment only — the part is manufactured by POOLPOINT, not by Pleatco.

Is PWK45N a genuine Pleatco part?

No. POOLPOINT manufactures compatible aftermarket replacement parts. We are not affiliated with, sponsored by or endorsed by Pleatco; the brand name and OEM numbers are used to identify fitment only.

What is the minimum order quantity for PWK45N?

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.

PWK45N

Hot Tub Filter Cartridge, 45 Sq Ft, 8-1/2 x 10-9/16 In., Replacement for Pleatco PWK45N, Filbur FC-3929

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