Part # PL0163
Dimensions 25.5" L x 8-5/8" W x 8-5/8" D
PureLine Replacement Cartridge for Sta-Rite® System 3 Model S7M120 Filters
Keeping your pool water clean and crystal clear starts with a reliable filtration system. Over time, pool filter cartridges wear out, restricting water flow and reducing system performance. If you’ve noticed cloudy water, higher PSI readings on your pressure gauge, or weaker return jets, it may be time to replace your filter cartridge. The PureLine aftermarket cartridge is engineered as a cost-effective, high-quality replacement for the Sta-Rite® System 3 Model S7M120 filter.
Why Replace Your Cartridge?
Filter cartridges work hard to trap dirt, oils, and debris. As buildup occurs, your pool system has to work harder, increasing strain on your pump and wasting energy. Regular cartridge replacement helps you maintain balanced water chemistry, improve circulation, and extend the life of your equipment.
For single-cartridge filters, we recommend replacement every 6–12 months depending on usage and water conditions. For multi-cartridge filters like the S7M120 cartridge set, replacement is typically needed every 3 years.
PureLine Cartridge Benefits
Affordable Alternative – Less expensive than the OEM cartridge, but built to the same high standards.
Optimized Flow – Designed to maximize water flow and extend cartridge life.
Even Dirt Distribution – Engineered pleats ensure balanced filtration and improved efficiency.
Energy Savings – Higher flow rates reduce strain on your pool pump, helping lower energy usage.
Banded Pleats – Provide strength and reduce the frequency of cleaning.
Durability – Constructed to withstand repeated cleanings without premature wear.
When compared with original Sta-Rite pool filter cartridges, PureLine delivers excellent value without compromising performance.
Compatible Models and Part Numbers
This aftermarket cartridge set is a direct replacement for the Sta-Rite® System 3 S7M120 filter. It replaces the following OEM part numbers:
25021-0200S – Small cartridge element
25022-0201S – Large cartridge element
When installed together, these cartridges form the S7M120 cartridge set, restoring your filter to peak operating condition.
Common Uses
The S7M120 replacement filters are commonly used in:
Sta-Rite® System 3 Mod S7M120 filters
Residential and commercial pool systems that require large-capacity filtration
Pool owners seeking cost-effective alternatives to OEM cartridges
For detailed installation and part references, many pool owners rely on the S7M120 parts diagram to confirm sizing and compatibility.
Frequently Bought With
S7M120 Tank O-Ring (24850-0008) – Ensures a proper seal during cartridge replacement.
Additional maintenance items such as pressure gauges, drain plugs, and replacement manifolds.
Not Your Cartridge?
If the S7M120 filter is not your model, don’t worry. We carry thousands of pool filter replacement cartridges for popular OEM brands, including Sta-Rite®, Pentair® / Pac Fab®, Hayward®, Purex®, American Products®, Jacuzzi®, Hot Springs®, Coleman®, and more. Browse our full selection to find the right fit for your system.
Disclaimer
All manufacturers’ names, brand names, trademarks, images, symbols, descriptions, and part numbers are used herein for reference purposes only. This product is not manufactured by Sta-Rite® or Pentair®. It is a PureLine aftermarket replacement cartridge made for compatibility with the models listed above.
Do you carry generic replacement cartridges for the Sta-Rite Modular Media Systems 2 and 3 cartridge filters?
Reply
There are currently no generic versions of these cartridges, only the original Sta-Rite brand. You can find these at http://www.inyopools.com/cartridges_starite.aspx
Reply
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
Reply
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.
Reply
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.
Reply
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
Reply
I am looking for the following replacement cartridges, 25022-0221 and 25021-0220, do you carry these?
Reply
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.
Reply
1 to 2 hrs
Screwdriver
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.
Less than 1 hr
Screwdriver, hands
3 1
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
$525.99
$329.00
$32.29
$230.31
The Most Recent Reviews
(5 out of 5 stars) Good filters
Reviewed By: Inyo Customer ()
Well made replacement filters. Perfect fit
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(5 out of 5 stars)
Reviewed By: Inyo Customer ()
Sent all the way to Washington State. Easy to install and should cleanup for the next few years.
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(5 out of 5 stars)
Reviewed By: Inyo Customer ()
I needed to replace my filters and inyo pools had a special when you bought inner and outer so saved money and they work great
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(5 out of 5 stars) Easy replacement filters!
Reviewed By: Inyo Customer ()
Very easy access to exact replacement filters!
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(5 out of 5 stars) East To install and seemed to be of high quality
Reviewed By: Inyo Customer ()
East To install and seemed to be of high quality
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0 2
(4 out of 5 stars) Priced too high but less than at local pool companies
Reviewed By: Inyo Customer ()
These are priced too high but less than at local pool companies... They work well on our pool to keep it clean, just really hard to clean, so we use and throw them away pretty much 80% of the time.
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1 1
(5 out of 5 stars) Replacement Cartridges
Reviewed By: Inyo Customer ()
Works Great. Pool cleared up quickly after Spring opening.
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1 0
(5 out of 5 stars) Awesome Product
Reviewed By: Inyo Customer ()
Awesome product
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7 1
(5 out of 5 stars) Great Pool filter cartridge
Reviewed By: Raj Pari from San jose, CA ()
This System3 Modular Media S7M120 100 Sq Ft, Inner Replacement Cartridge was delivered safely and on time. This looks like the original equipment high quality standard and I am very pleased with it. It was also a great price. It was easy to replace into the System 3 filter itself, and the new cartridges have made a great difference in improving the pool water cleaning process.
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1 0
(5 out of 5 stars) filter
Reviewed By: Tony T. from collegeville;pa ()
Pros: new an quick free shiiping
Cons: na
Looks clean and new. Seller was very quick to ship and the pricing was excellent.
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1 0
(4 out of 5 stars) Jim
Reviewed By: Jim H. ()
Pros: Good product, Free shipping
Good product, reasonable cost.
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1 0
(5 out of 5 stars) Pool Filters
Reviewed By: Robert H. ()
It was time for new filters when I opened my pool. The new filters were the exact ones I needed and came in three days. My pool went from "nasty" to crystal clear overnight! Great price.
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3 0
(5 out of 5 stars) great filter cartridge
Reviewed By: swimming fool from Kilgore, TX ()
Decided my filter cartridges were too old after miserable time last summer fighting algae. Thought it was just because of very hot summer weather, but water started clearing up immediately w/ new cartridges. INYO shipped correct product very quickly and shipping charges were quite reasonable. There were no unexpected fees and the amount I had agreed to was all that was charged to my credit card. I will definitely order from INYO again.
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1 0
(5 out of 5 stars) instantanious performance change
Reviewed By: Louis C. from Hauppauge, NY ()
I was truely amazed at the instantanious performance change this filter made in my pump!
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