By PureLine



Part # PL0163

Dimensions 25.5" L x 8-5/8" W x 8-5/8" D

Alternate Part #'s 170145, 25021-0200S, 25022-0201S

Product Description

PureLine Aftermarket Replacement Cartridge for Sta-Rite® System 3 Model S7M120 Filters

Is your pool water starting to look a little dull? Is your pressure gauge reading a higher PSI than normal? Are your pool jets a little less powerful? These are all signs that it is time to replace your pool filter cartridge. Replace your pool filter cartridge today and regain that crystal clear pool water and extend the life of your pool pump.

Typically for single cartridge pool filters we suggest replacing your cartridge every 6-12 months and for filters which take multiple cartridges, we suggest replacing your cartridges every 3 years.

Frequently Bought with S7M120 Cartridges S7M120 Tank O-ring 24850-0008

This Cartridge Set is Commonly Used In

PureLine Cartridge Benefits

  • Less expensive than the original manufacturer with the same high-quality standards
  • Designed for maximum water flow to extend cartridge life
  • Designed for even dirt distribution resulting in increased water flow
  • Increased flow rates results in less wear on pump & reduced energy usage
  • Banded Pleats reduce frequency of cartridge cleaning

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.


Product Specifications

Filtration Area:
300 sq. ft.
25.5" in.
8-5/8" in.

?     Asked on 2/29/2012by Guest

Do you carry generic replacement cartridges for the Sta-Rite Modular Media Systems 2 and 3 cartridge filters?

A  Answered on 2/29/2012 by InyoPools Product Specialist Patrick P.

There are currently no generic versions of these cartridges, only the original Sta-Rite brand.  You can find these at

?     Asked on 10/8/2018by JD

Hi I’m looking for replacement filter cartridges for our Sta-rite system 3 filter. The serial number for the big on is 25022-0221 and 250022-0224. Will this one replace that? Thank you

A  Answered on 10/10/2018 by Industry Professional

Hi JD yes this is the proper replacement cartridge set for your Sta-rite system 3 filter which is using the 25022-0221 and 250022-0224 cartridges.

?     Asked on 3/18/2019by Vince Pangallo

On this system 3 unit I also need the O-Rings to both of these filters. Do you carry them? Having a heck of time the unit is the original Sta-Rite system 3 before they were bought out.

A  Answered on 3/18/2019 by InyoPools Product Specialist Patrick P.

Hi Vince you will need this O-485 Tank O-ring for your S7M120 Filter. You may also view here all of the Parts for the S7M120 Sta Rite Filter

?     Asked on 4/7/2019by Rich

I am looking for the following replacement cartridges, 25022-0221 and 25021-0220, do you carry these?

A  Answered on 4/9/2019 by InyoPools Product Specialist Patrick P.

Hi Rich, Could you confirm if you have the Sta-Rite S7M120 or if you have the S7M400? This would allow us to properly recommend the appropriate replacement cartridges for you.

?     Asked on 5/4/2019by Dundee m

I have a star bright with the inner and outer filters which filter do I replace first

A  Answered on 5/4/2019 by InyoPools Product Specialist Lennox H.

Hi, Dundee. You will need to provide us with the model or dimensions of your unit.


Est. Repair Time

1 to 2 hrs

Tools Needed


Filters need replacing.

Written on 2/21/2021 by Guest

Shut off power from the pump. Check for no power and drain filter. Remove clamps. Remove cover and take out filters. Wash out filter body. Replace drain plug, install new filters. Install new rubber o ring. Put on cover and install clamps.

Were these instructions helpful? 


Est. Repair Time

1 to 2 hrs

Tools Needed

Adjustable Wrench

0     3

Old filter was pretty worn out.

Written on 4/10/2020 by Guest

Took the old filters out. Installed new filters and reassembled the container.

Were these instructions helpful? 


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, hands

3     1

Banding on Old Filter Coming Apart

Written on 4/25/2019 by Guest

1. Shut down pump
2. Drain filter housing
3. Remove filter elements
4. Clean filter housing
5. Reinstated new filter elements, replaced drain plug in filter housing
6. Filled bottom of filter housing with water and replaced top half of housing and tightened clamps
7. Cleaned suction screen on filter pump and replaced
8. Vented filter housing and restarted filter pump
9. Once filter housing filled with water, closed vent and enjoyed pool

Were these instructions helpful? 


Review Summary

 (Average 4.91  out of 5 stars)
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