When selecting a large cartridge pool filter with 400 sq ft of filtration area, durability, efficiency, and ease of maintenance are key. The Best Overall pick is the S7M400 Pool Filter Cartridges Replacement Set due to its reliable performance and compatibility. The Essential Series for Hayward C4020 stands out for affordability, while the Ultra Series Pool Filter Cartridges offers a great balance of value and quality in a 4-pack. Buyers must weigh tradeoffs like upfront cost versus long-term savings and compatibility with existing equipment. Continue reading for a detailed breakdown of each option to find the best fit for your pool needs.
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Key Takeaways
- Top picks are distinguished by build quality, compatibility, and price point, with the S7M400 offering the most reliable performance overall.
- Compatibility with popular pool systems like Hayward C4020 is a major factor, making some options more versatile than others.
- Bulk pack options like the Ultra Series provide better value per filter but may sacrifice some ease of handling.
- Price differences often reflect differences in material quality and longevity, influencing long-term savings.
- Most filters require regular cleaning and maintenance, but some models are designed for easier cartridge removal and replacement.
| S7M400 Pool Filter Cartridges Replacement Set (400 Sq. Ft.) |  | Best Overall for Compatibility and Ease of Maintenance | Compatibility: Sta-Rite System 3 S7M400 | Filtration Area: 400 sq. ft. | Includes: 1 inner, 1 outer cartridge | VIEW ON AMAZON | See Our Full Breakdown |
| Essential Series for Hayward C4020 Pool Filter Cartridges 400 sq ft |  | Best Value for Reliable, Multi-Model Compatibility | Fits: Hayward C4020/C4000/C4000S | Replaces: CX870XRE, CX870XREPAK4, PA100N, PA100N-PAK4 | Pack Size: 4-Pack | VIEW ON AMAZON | See Our Full Breakdown |
| Cryspool 400 Sq. Ft Pool Filter Cartridge Replaces S7M400 |  | Best for Long-Lasting Durability with Advanced Filtration | Size: Outer: 18-3/4″ x 16-1/2″; Inner: 25-1/4″ x 8-3/4″ | Total Filtration Area: 400 sq. ft. | Item Weight: 31.4 pounds | VIEW ON AMAZON | See Our Full Breakdown |
| Pro Series for Hayward C4020 Pool Filter Cartridges 400 sq ft |  | Best for Fine Debris Capture and Longevity | Fits: Hayward C4020/C4000/C4000S | Replaces: CX870XRE, PA100N, C-7487, FC-1270 | Pack Size: 4-pack | VIEW ON AMAZON | See Our Full Breakdown |
| Ultra Series Pool Filter Cartridges for Hayward C4020, 400 sq ft, 4-Pack |  | Best for Heavy-Duty, Demanding Conditions | Fits: Hayward C4020/C4000/C4000S | Replaces: CX870XRE, PA100N, C-7487, FC-1270 | Pack Size: 4-Pack | VIEW ON AMAZON | See Our Full Breakdown |
| S7M400 Pool Filter Cartridges Replacement for Sta-Rite System 3 |  | Best for High Filtration Efficiency and Ease of Maintenance | Filtration area: 400 sq ft | Compatible model: Sta-Rite System 3 S7M400 | Includes external cartridge: 25021-0224S | VIEW ON AMAZON | See Our Full Breakdown |
| large cartridge pool filters 400 sq ft | Fits | Replaces | Pack Size | Filter Area |
|---|---|---|---|---|
| S7M400 Pool Filter Cartridges | — | — | — | — |
| Essential Series for Hayward C | Hayward C4020/C4000/C4000S | CX870XRE, CX870XREPAK4, PA100N, PA100N-PAK4 | 4-Pack | 400 sq ft |
| Cryspool 400 Sq. Ft Pool Filte | — | — | — | — |
| Pro Series for Hayward C4020 P | Hayward C4020/C4000/C4000S | CX870XRE, PA100N, C-7487, FC-1270 | 4-pack | 400 sq ft |
| Ultra Series Pool Filter Cartr | Hayward C4020/C4000/C4000S | CX870XRE, PA100N, C-7487, FC-1270 | 4-Pack | 400 sq ft |
| S7M400 Pool Filter Cartridges | — | — | — | — |
More Details on Our Top Picks
S7M400 Pool Filter Cartridges Replacement Set (400 Sq. Ft.)
This replacement set is tailored specifically for the Sta-Rite System 3 S7M400, making it the top choice for owners of that model. Its 400 sq. ft. filtration area, combined with trilobal filter media, ensures high efficiency and durability. Compared with the Cryspool option, its reinforced design and chlorine-resistant end caps provide better longevity in regular use. However, its narrow compatibility limits its appeal if you own a different system, and regular rinsing is necessary to maintain flow. This set makes the most sense for pool owners seeking a straightforward, reliable replacement for their existing S7M400 filter. The easy-to-clean design and high-quality materials justify its premium price for dedicated S7M400 users.Pros:- High-capacity 400 sq. ft. filtration area for effective water cleaning
- Constructed with durable, chlorine-resistant trilobal media
- Easy to rinse and maintain with garden hose
Cons:- Designed solely for S7M400 models, limiting versatility
- Requires regular rinsing to prevent pressure drops
Best for: Pool owners with a Sta-Rite System 3 S7M400 looking for a straightforward, durable replacement
Not ideal for: Owners of other filter systems or those needing a multi-system compatible option, due to its limited compatibility
- Compatibility:Sta-Rite System 3 S7M400
- Filtration Area:400 sq. ft.
- Includes:1 inner, 1 outer cartridge
- Material:Trilobal filter media
- Design Features:Reinforced center supports, chlorine-resistant end caps
- Cleaning:Easy rinsing with garden hose
Our verdict“This pick is ideal for dedicated S7M400 owners prioritizing reliability and ease of maintenance.”
Essential Series for Hayward C4020 Pool Filter Cartridges 400 sq ft
This four-pack of cartridges offers dependable filtration for Hayward C4020 series pools, supporting 100 sq ft each for a total of 400 sq ft. Its round-fiber media provides effective dirt and debris capture, comparable to the Pro Series but often at a slightly lower price point. Unlike the Ultra Series, it lacks some of the reinforced construction features, making it more suitable for moderate use rather than high-demand environments. The dimensions are standard, but verifying fit is essential before purchase. This set is well-suited for those who want a reliable, cost-effective replacement without the need for heavy-duty features, making it perfect for regular residential pools.Pros:- Includes 4 cartridges for extended maintenance intervals
- Easy to clean and maintain with round-fiber media
- Compatible with multiple Hayward models, offering versatility
Cons:- Requires manual cleaning when pressure increases
- Dimensions must be checked for proper fit
Best for: Homeowners with Hayward C4020 pools seeking a budget-friendly, reliable replacement set
Not ideal for: Pools with high debris loads or frequent heavy use, where more durable or reinforced cartridges are needed
- Fits:Hayward C4020/C4000/C4000S
- Replaces:CX870XRE, CX870XREPAK4, PA100N, PA100N-PAK4
- Pack Size:4-Pack
- Filter Area:400 sq ft
- Dimensions:7 in. OD x 25-1/2 in. L
- Certification:NSF/ANSI 50
Our verdict“This set offers solid value for homeowners needing reliable, compatible cartridges for standard Hayward pools.”
Cryspool 400 Sq. Ft Pool Filter Cartridge Replaces S7M400
Designed as a direct replacement for the S7M400, this Cryspool cartridge features advanced trilobal fiber material for thorough filtration and longer service life. Its high filtration area ensures excellent water clarity and is comparable to the S7M400 but with an emphasis on durability. The heavier weight—over 31 pounds—reflects its robust construction, which can be a drawback for handling but benefits high-use or demanding environments. Unlike the lightweight alternatives, this model’s weight and build make it better suited for dedicated pool owners who prioritize longevity and heavy-duty performance over ease of handling. If weight and size are manageable, this cartridge can provide reliable, extended service.Pros:- High filtration area for effective water cleaning
- Durable trilobal fiber extends lifespan
- Easy to clean and maintain
Cons:- Heavy weight complicates handling and installation
- Limited compatibility beyond specific models
Best for: Pool operators needing a heavy-duty, long-lasting replacement for high-demand or large pools
Not ideal for: Homeowners with limited strength or those who prefer lightweight, easier-to-handle cartridges
- Size:Outer: 18-3/4″ x 16-1/2″; Inner: 25-1/4″ x 8-3/4″
- Total Filtration Area:400 sq. ft.
- Item Weight:31.4 pounds
- Model Number:CP-S7M400
Our verdict“This cartridge is best for those seeking maximum durability and filtration performance in demanding pool environments.”
Pro Series for Hayward C4020 Pool Filter Cartridges 400 sq ft
This four-pack offers 10-micron filtration, making it ideal for capturing fine particles, unlike the standard Essential Series which filters larger debris. Its sturdy construction with molded end caps and reinforced core provides better durability for regular use. While comparable to the Ultra Series, it doesn’t feature the same level of heavy-duty materials, making it more suitable for typical residential pools rather than demanding conditions. The need for manual cleaning when pressure rises remains, but its fine filtration capability makes it a strong choice for pool owners prioritizing water clarity and debris removal. For those who want a combination of affordability and effective fine debris filtration, this set is a smart pick.Pros:- Effective 10-micron filtration captures fine debris
- Durable molded end caps and reinforced core
- Easy to rinse and maintain
Cons:- Requires manual cleaning when pressure increases
- Limited to specific pool models
Best for: Pool owners seeking effective fine debris filtration in residential settings with moderate use
Not ideal for: High-traffic or heavily debris-laden pools requiring more heavy-duty construction
- Fits:Hayward C4020/C4000/C4000S
- Replaces:CX870XRE, PA100N, C-7487, FC-1270
- Pack Size:4-pack
- Filter Area:400 sq ft
- Dimensions:7 in. OD x 25-1/2 in. L
- Micron Rating:10 microns
Our verdict“This set suits homeowners prioritizing fine debris removal and reliable filtration in standard residential pools.”
Ultra Series Pool Filter Cartridges for Hayward C4020, 400 sq ft, 4-Pack
Built for high-use pools, the Ultra Series cartridges feature heavy-duty trilobal fibers capable of capturing particles as small as 10 microns, similar to the Pro Series but with reinforced construction for added durability. Its robust design supports demanding debris conditions, making it ideal for commercial or large residential pools. Compared to the Essential Series, these cartridges are more expensive but provide longer-lasting performance with greater resistance to wear and tear. The size and weight require careful handling, but this investment in durability makes them suitable for intensive use. They deliver consistent, fine filtration, making them a preferred choice for pool owners who need reliable, heavy-duty performance.Pros:- Heavy-duty trilobal media captures small particles effectively
- Reinforced construction supports high-demand conditions
- Easy to rinse and maintain with clear pressure guidelines
Cons:- Requires depressurizing and manual rinsing for cleaning
- Potentially higher cost due to heavy-duty materials
Best for: High-use, demanding pools requiring durable, heavy-duty filtration with fine debris capture
Not ideal for: Owners with smaller pools or infrequent use where lighter, less expensive cartridges suffice
- Fits:Hayward C4020/C4000/C4000S
- Replaces:CX870XRE, PA100N, C-7487, FC-1270
- Pack Size:4-Pack
- Filter Area:400 sq ft
- Dimensions:7 in. OD x 25-1/2 in. L
- Filtration Micron:10 microns
Our verdict“This set is ideal for pool operators who need durable, high-performance cartridges capable of handling demanding debris loads.”
S7M400 Pool Filter Cartridges Replacement for Sta-Rite System 3
This cartridge stands out for its innovative three-leaf filter cloth structure, which significantly increases the filtration surface compared to standard designs like the Ultra Series. Its shallow pleat configuration makes rinsing quick and straightforward, reducing maintenance time. While it offers excellent filtration performance and durability thanks to high-quality materials, it is not manufactured by Sta-Rite itself, raising questions about long-term consistency and warranty support. Compared with the Cryspool cartridge, the S7M400 provides a larger external filtration area, which is beneficial for larger pools needing high capacity. However, compatibility verification is essential because it isn’t sold directly by the original brand, limiting straightforward replacement for some models.
Pros:- Enhanced filtration capacity with three-leaf cloth design
- Quick and easy rinsing reduces maintenance time
- Constructed from durable, pressure- and chlorine-resistant materials
Cons:- Not manufactured or sold directly by the original brand
- Requires careful compatibility verification for different models
Best for: Pool owners seeking high filtration capacity with minimal maintenance effort, especially those using Sta-Rite System 3 filters.
Not ideal for: Buyers who prioritize brand authenticity and warranty support, as this product isn’t manufactured by Sta-Rite and may require compatibility checks.
- Filtration area:400 sq ft
- Compatible model:Sta-Rite System 3 S7M400
- Includes external cartridge:25021-0224S
- External filtration area:136 sq ft
- Filter cloth structure:Three-leaf design
- Material durability:Chlorine and pressure resistant
Our verdict“This filter is ideal for pool owners who prioritize high capacity and ease of maintenance, provided they confirm compatibility with their system.”
How We Picked
Products were evaluated based on their filtration efficiency, build quality, compatibility with standard pool systems, ease of installation, and user reviews. We prioritized options that offer proven durability and ease of maintenance, ensuring they meet the demands of large 400 sq ft systems. The ranking reflects a balance between performance, value, and versatility, with top picks excelling in overall reliability and long-term cost-effectiveness. We aimed to highlight options suitable for both homeowners seeking dependable performance and those looking for better value in bulk packs.| large cartridge pool filters 400 sq ft | Replaces |
|---|---|
| S7M400 Pool Filter Cartridges | — |
| Essential Series for Hayward C | CX870XRE, CX870XREPAK4, PA100N, PA100N-PAK4 |
| Cryspool 400 Sq. Ft Pool Filte | — |
| Pro Series for Hayward C4020 P | CX870XRE, PA100N, C-7487, FC-1270 |
| Ultra Series Pool Filter Cartr | CX870XRE, PA100N, C-7487, FC-1270 |
| S7M400 Pool Filter Cartridges | — |
Factors to Consider When Choosing Large Cartridge Pool Filters 400 Sq Ft
Choosing the right large cartridge pool filter involves considering several critical factors beyond just size. Understanding these elements helps ensure you select a filter that performs reliably over time and fits your specific pool setup. From compatibility to maintenance, being aware of tradeoffs can save you money and frustration in the long run.Compatibility with Your Pool System
Not all filters fit every pool system. Confirm the cartridge size and connection type before purchasing to avoid costly returns or replacements. Some brands, like Hayward, have widely used models, making compatibility easier, but always double-check your system specifications. Choosing a compatible filter minimizes installation issues and ensures optimal filtration performance.
Material Quality and Durability
Higher-quality materials, such as durable pleated fabric and sturdy end caps, extend the lifespan of your filter. Cheaper options may save money upfront but tend to wear out faster, leading to more frequent replacements. Investing in well-built cartridges can reduce long-term costs and maintenance efforts, especially for large pool systems running for extended seasons.
Ease of Maintenance and Replacement
Look for filters that are easy to remove, clean, and replace without disassembling the entire system. Features like quick-release clips or handles can make routine maintenance less of a chore. Simpler maintenance procedures encourage more regular cleaning, which in turn maintains water clarity and extends the life of your equipment.
Cost and Value Considerations
While premium filters often last longer, bulk packs or less expensive models can deliver better value for budget-conscious buyers. Consider the total cost of ownership, including frequency of replacement and maintenance. Sometimes paying a bit more upfront for a higher-quality filter pays off through fewer replacements and better performance.
Long-term Performance and Longevity
Assess how well a filter maintains its filtration efficiency over time. Some models may clog faster or lose effectiveness after a season, requiring more frequent replacements. Choosing a filter with proven longevity ensures your pool remains clear with less frequent downtime for maintenance, saving you time and money.
Frequently Asked Questions
How do I know if a filter is compatible with my pool system?
Compatibility depends on the filter’s physical size, connection type, and flow rate, which must match your pool system’s specifications. Check your pool’s manual or existing filter for model numbers and dimensions, then verify these details with the product specifications. When in doubt, contacting the manufacturer or supplier can prevent costly mismatches and ensure seamless installation.
How often should I replace my large cartridge filter?
Most cartridges should be replaced every 1 to 3 years, depending on usage, water quality, and maintenance routines. Regular cleaning extends their lifespan, but signs like reduced water flow or visible wear indicate it’s time for a replacement. Investing in high-quality filters can push this interval longer, helping maintain optimal pool clarity without frequent replacements.
Are bulk pack filters worth it for a large pool?
Bulk packs typically offer better per-unit prices, making them cost-effective over time. They are especially advantageous if you have a large or heavily used pool, as they reduce the need for frequent purchases. However, ensure the cartridges meet quality standards and are compatible with your system to avoid wasting money on inferior or mismatched filters.
What features make a filter easier to maintain?
Features like quick-release clips, handles for easy removal, and clear instructions simplify routine cleaning and replacement. Some models include pre-fitted gaskets or tool-less designs that save time and effort. Choosing these features reduces the hassle of regular maintenance and encourages consistent cleaning, which is key to maintaining water clarity.
Is it better to pay more for a premium filter?
Premium filters often offer longer durability, better filtration media, and easier maintenance, which can justify higher upfront costs. For large pools that operate year-round, investing in quality filters can reduce replacement frequency and improve water quality. However, if your pool sees limited use or you have a tight budget, a well-reviewed mid-range option may deliver sufficient performance at a lower price.
Conclusion
For those seeking maximum reliability and performance, the S7M400 Pool Filter Cartridges Replacement Set stands out as the best overall choice. Budget-conscious buyers will find the Essential Series for Hayward C4020 offers solid value, while the Ultra Series Pool Filter Cartridges provide excellent bulk pack savings. Beginners or owners with simpler setups should prioritize filters with easier maintenance features, like the Cryspool model. For large, demanding pools, investing in premium options can pay off through increased longevity and efficiency, making the right choice largely dependent on your pool size, usage, and maintenance preferences.
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