Part # NFC2540

Manufacturer Code WC108-57S2X

Dimensions 8.6875" L x 8.6875" W x 18.1875" D

Alternate Part #'s 171751680, 17201, FC-2540, FC2540, PSR70, PSR70-4, PSR704, R173345, STA06241, UHD-SR70, UHDSR70, UNI605223, WC108-57S2X, WC10851S1X, WC10857S2X, 17-175-1680, APCC7220, PLEPSR70, UNI-60-5223

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.

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/PTM 70
Filtration Area:
70 sq. ft.
8-11/16 in.
18-3/16 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 5/31/2018by duffy westmoreland

my pool filter model number is tx 70 will this fit ?

A  Answered on 5/31/2018 by InyoPools Product Specialist Lennox H.

Hi, Duffy. Yes, this is the correct replacement cartridge for your unit. 

?     Asked on 7/11/2018by Robert Ramsey

The model # is (T- 70TXR) on the canister and the replacement filter # is (WC108-57SIX). Is this TX 70 Cartridge filter the right one for my pool?

A  Answered on 7/11/2018 by InyoPools Product Specialist Lennox H.

Hi, Robert. This Sta-Rite TX 70 Generic Cartridge is the correct replacement for the T-70TXR filter. 

?     Asked on 5/1/2020by William Bellsiano

What happened to the 50% off cartridges when I first open the screen up that's what it said and I applied for but about it or was that just to come on??? Thank you

A  Answered on 1/8/2021 by InyoPools Product Specialist Hector F.

Hi William, the up to 50% off cartridge sale at that time referred to our generic cartridge options in contrast to our regular priced original manufacture cartridges. 


Review Summary

 (Average 4.67  out of 5 stars)
3 Rating
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