Part # NFC2560

Manufacturer Code WC108-59S2X

Dimensions 34.5" L x 8.6875" D x 4.1875" ID

Alternate Part #'s 23301, FC-2560, FC2560, PSR135-4, PSR1354, R173349, STA06243, UHD-SR135, UHDSR135, UNI605225, WC108-59S2X, WC10853S1X, WC10859S2X, 17-175-1690, APCC7310, PLEPSR135-4

Product Description


  • Our generic replacement cartridges are less expensive than the original manufacturers' brands yet still meet the same high quality standards.  The key components of a cartridge - filter media, core, and end cap - are all designed for maximum water flow and cartridge life.
  • The filter media is point bonded polyester with even fiber distribution which results in an even dirt load and increased water flow.  
  • The Sharp & Uniform pleated media provides filtration area (square footage) that meets or exceeds the original manufacturers' specifications.  
  • An open core design provides sturdy support for the media without restricting flow.  Increased flow rates result in less wear on the pump and reduced energy usage.  
  • Anti-microbial end caps inhibit the growth of bacteria, mold and mildew while supporting the core and media.
  • Banded Pleats maximize flow during operation, and help to reduce the frequency of cleaning.  Banded pleats also make the cartridge easier to clean.

Not Your Cartridge?

Is this not your Cartridge? Don't worry, we carry thousands of Pool Filter Replacement Cartridges to replace all of the most popular OEM brands such as Sta-Rite®, Pentair® / Pac Fab®, Hayward®, Purex®, American Products®, Jacuzzi®, Hot Springs®, Coleman®, and more. Click here for more Pool Filter Replacement Cartridges


All manufacturers’ names, brand names, trademarks, images, symbols, descriptions, and part numbers are used herein for reference purposes only.

You should consider the Microban version of this filter!

Why Microban Protection?

Water and an ample food source provide the ideal condition for bacteria to quickly multiply and grow. In fact, on an unprotected surface, some microbes can double in number every 20 minutes. And only when they’ve multiplied to hundreds of thousands, can they actually be seen by the naked eye.

The images below show bacteria growth on a standard pool filter cartridge versus a pool filter cartrdge infused with Microban® antimicrobial protection over a 24 hour period.

Microban Pool Filter Cartridge

After viewing these images, you can see how Microban® protection begins to work immediately, disrupting key bacterial cell functions so that bacteria are unable to grow or reproduce on the surface. While on the unprotected surface, bacteria quickly multiply.

Top End Cap Top End Cap
Bottom End Cap Bottom End Cap

Product Specifications

Filter Model:
Posi-Flo® TX/TXR-135 (Stainless Only)
Filtration Area:
135 sq. ft.
34-1/2 in.
8-11/16 in.
Top Inside Diameter:
4-3/16 in.
Bottom Inside Diameter:
4-3/16 in.
Top Style:
Bottom Style:
Media Weight:
4 oz.
OEM #:
Unicel #:
Filbur #:
Pleatco #:

?     Asked on 6/14/2015by Inyo Visitor

Will this filter replace: Unicel 135 sq ft Wc108-59SIX 135 GPM 50 PSI 135 GPM? I do not want to order a filter I am not sure will replace my existing filer.

A  Answered on 6/14/2015 by InyoPools Product Specialist Patrick P.

Yes this would be the correct replacement cartridge for your Wc108-59SIX.

?     Asked on 3/19/2016by Bonnie

is this the correct filter for a Posi Flo model Tx 135? Also is this the right filter for our 20x40 in ground pool with an eight foot deep end?

A  Answered on 3/21/2016 by InyoPools Product Specialist Lennox H.

Hi Bonnie, This is the correct replacement cartridge for the Posi Flo TX135.

?     Asked on 2/22/2017by marie

I have a silver bullet type (sta-rite posi-flo) pool filter. it uses the generic 135sf filters, tall ones. I need to know what size o ring to get because I need to replace it.

A  Answered on 2/22/2017 by InyoPools Product Specialist Scott W.

The o-ring is part number WC9-3.

?     Asked on 6/17/2017by Inyo Visitor

what is the size of this filter

A  Answered on 6/17/2017 by InyoPools Product Specialist Hector F.

The dimensions read as approximately 8-11/16" in diameter, 34-1/2" in length, 4-3/16" top and bottom inside diameter,

?     Asked on 5/7/2018by Don Brincka

I have a "Posi-Flo" filter, requiring a "135 TXR" filter cartridge. Is this a replacement for it?

A  Answered on 5/8/2018 by InyoPools Product Specialist Hector F.

Yes, this is would be the correct generic cartridge replacement for your filter. 


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