Hurricane Inner & Outer Replacement Cartridge Set for Sta-Rite 300 sq. ft. S7M120
Hurricane Inner & Outer Replacement Cartridge Set for Sta-Rite 300 sq. ft. S7M120
Do you need to restore the Sta-Rite 300 sq. ft. System 3 S7M120 pool filter cartridges? The Hurricane HF-STR3-300S7-SET Advanced Filter Cartridge Set replaces both the inner and outer cartridges. This 21-inch cartridge delivers a direct replacement for the popular Pentair filter. The premium filter media traps fine particles that restrict circulation. Now, a cost-effective upgrade that offers OEM quality performance.
- Fits inner filter replacement for 25021-0200S, 25021-0200 and the outer filter replacement for 25022-0201S.
What makes the Hurricane HF-STR3-300S7-SET a reliable replacement for the Sta-Rite System 3 S7M120?
The HF-STR3-300S7-SET matches the dimensions and performance requirements of the Sta-Rite System 3 S7M120. It replaces both cartridges for optimal efficiency. Furthermore, it prevents uneven loading and pressure issues common with partial replacements. Shasta Pool Supply recommends these replacement cartridges for restoring factory-level filtration.

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Key Features
- Complete Inner & Outer Cartridge Set – Replaces both filters and restores balanced flow and full filtration efficiency
- Advanced Pleated Filter Media – Captures fine debris, oils, and contaminants
- Exact-Fit Replacement Design – Matches Sta-Rite System 3 S7M120 specifications
- Improves Water Clarity & Pressure Stability – Helps eliminate pressure spikes caused by uneven or worn cartridges
- Durable Reinforced End Caps – Built to withstand repeated cleaning cycles
- Cost-Effective OEM Alternative – Delivers reliable performance comparable to original filters
Technical Specifications
- Filter Type: Pool filter cartridge set (inner & outer)
- Cartridge Length: 21 inches
- Compatibility: Sta-Rite System 3 S7M120
- OEM Replacement Part Numbers: Inner: 25021-0200S Outer: 25022-0201S
- Installation: Drop-in replacement (no tools required)
- Set Includes: (1) Inner cartridge + (1) Outer cartridge
Specs
- Part Number: HF-STR3-300S7-SET
- Manufacturer: Hurricane
- Length: 19.0
- Width: 18.5
- Height: 31.5
Are aftermarket replacement cartridges as good as original Sta-Rite filters?
High-quality aftermarket cartridges can perform just as well as original Sta-Rite filters. Replacements designed specifically for Sta-Rite System 3 cartridges balance pressure and filtration. Hurricane cartridges use advanced pleated media and reinforced end caps to deliver comparable water clarity. When installed and maintained properly, most pool owners see no performance difference.
Shasta Pool Supply offers more replacement cartridge options. Checkout our entire selection of Filter Cartridges.
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What our customers are saying
Exactly what I ordered, package arrived in a timely manner and the quality was excellent.
Exactly what I ordered, package arrived in a timely manner and the quality was excellent.
Tera B
Easy to order and arrived on time.
Easy to order and arrived on time.
David F
Thank you, Dan for making the process so simple and giving me the part at such a great price.
Thank you, Dan for making the process so simple and giving me the part at such a great price.
cody l
FAQ
Our expert staff answers customer's most asked questions.
Is it better to replace just one cartridge or the full inner and outer set?
For System 3–style filters, replacing the full inner and outer set is always recommended. Mixing old and new cartridges can cause uneven filtration, pressure imbalance, and faster wear on the new cartridge.
What are the signs that my pool filter cartridges need to be replaced?
Common signs include rising filter pressure shortly after cleaning, cloudy or dull water, reduced circulation, and cartridges that appear frayed, flattened, or brittle.
How frequently should I clean my filter cartridges?
The cleaning frequency is contingent on your filter's size. As a general guideline, initiate the cleaning process when the filter pressure exceeds the initial pressure by 10 psi. This ensures optimal filtration efficiency.
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