Comparison Summary
Exact fit matters more than brand familiarity. The Unicel C-8412 is the strongest overall choice for a matching 120-square-foot Hayward or Waterway housing because its dimensions, pleat count, media and cross-references are clearly specified. Intex owners should favor the OEM 29002E or 29000E when their pump model appears on the compatibility list. Pentair CCP420 owners need a four-element set such as In The Swim WP.TS1977-4P or TOREAD TRF-7471, not a single 150-square-foot cartridge. For Pentair CC150 systems, iLiving ILG8CF150A and POOLPURE PLF150A provide compatible 150-square-foot alternatives, but the housing and end-cap dimensions still need to be confirmed before ordering.
The main tradeoff is between direct OEM fit, aftermarket value, and pack convenience. Aftermarket cartridges can make sense when the cross-reference and measurements match, but a listing’s filtration or durability claim does not remove the need to verify the housing. Small Type A/C cartridges also have much shorter replacement cycles than larger in-ground elements, so a multi-pack may be more useful than a theoretically higher-capacity cartridge that cannot fit.
Buying Guide
Sizing and Capacity
Filtration area is useful only after the cartridge fits the housing. The 120-square-foot Unicel C-8412 and POOLPURE PLF120A belong to the same general Hayward C1200 class, while the iLiving ILG8CF150A and POOLPURE PLF150A are for larger 150-square-foot Pentair-style housings. Their higher area does not make them upgrades for a smaller filter tank.
Pentair CCP420 replacements are a separate category. In The Swim WP.TS1977-4P and TOREAD TRF-7471 are four-element sets for a multi-cartridge system. They should not be compared with a single 120- or 150-square-foot replacement as though the pack formats were interchangeable. Small Intex Type A/C cartridges are also a separate class, generally around 8 inches long and 4 to 4.25 inches in diameter.
Feature Tradeoffs
OEM replacements are the simplest choice when the exact pump model is listed. Intex 29002E and 29000E reduce ambiguity for compatible above-ground systems, but their narrower model lists limit flexibility. Aftermarket cartridges such as the POOLPURE, iLiving, U.S. Pool Supply, and TOREAD options can be sensible when the old part number, dimensions, end caps, and cross-reference all agree.
Construction claims should be read in context. Pleated or trilobal media, support cores, reinforced end caps, and chemical-resistance statements describe design or listed construction; they do not guarantee a universal lifespan or identical performance in every pool. Pack size is another practical tradeoff: a four-pack helps a CCP420 owner replace all elements together, while a two- or three-pack is more appropriate for small cartridges that the manufacturer expects to be changed frequently.
Best For, Avoid If
| Profile |
Recommended Product |
Why It Fits |
Avoid If |
| Owners of Hayward C1200 or equivalent 120-square-foot housings |
Unicel C-8412 |
Its 23 5/16-inch length, 8 15/16-inch diameter, 4-inch openings, 120-square-foot area, and named Waterway cross-references make it the clearest match for this system class. |
You have a compact Intex Type A/C pump, a Pentair CC150 housing, or a CCP420 system requiring four elements. |
| Owners of listed Intex 530, 1,000, or 1,500 GPH pumps who prefer an OEM cartridge |
Intex 29002E Type A |
The 29002E is identified for specific Intex pump models, uses Dacron paper, and comes as a two-pack for the short replacement cycle described by the manufacturer. |
Your pump model is not listed or your housing uses a larger in-ground cartridge. |
| Pentair Clean & Clear Plus 420 owners replacing the complete element set |
In The Swim WP.TS1977-4P |
The four-pack is designed for CCP420 systems and is cross-referenced with common equivalent cartridge numbers. |
Your housing uses one cartridge rather than four, or your existing cartridge does not match the CCP420 dimensions and cross-references. |
| Pentair CC150 owners seeking a single 150-square-foot replacement |
iLiving ILG8CF150A |
The listing provides 31 1/8-inch height, 10 1/16-inch outside diameter, 6-inch opening, and multiple CC150-family cross-references. |
Your housing is a 120-square-foot model or the original cartridge has different end-cap measurements. |
| Above-ground pool owners who need several Type A/C cartridges for common 530-to-2,000-GPH pumps |
U.S. Pool Supply FCA-4 |
The four-pack covers listed Intex, Bestway, and Summer Waves applications and states compact 8-by-4.25-inch dimensions. |
You need an OEM-only match, a larger in-ground cartridge, or a different center-hole configuration. |
Key Specs to Compare
Start with the old cartridge part number or the exact filter model. If that information is missing, measure the complete cartridge from end cap to end cap, the outside diameter across the pleats, and the opening diameter and configuration at both ends. Measure the caps as well as the pleated section, and do not round 23 1/4 inches up to a neighboring size.
Then compare filtration area, cartridge count, media type, center support, end-cap construction, and the listed cross-references. The Unicel C-8412, for example, specifies 172 pleats, 4-ounce Reemay 2040 media, and 120 square feet. The small-pump selections instead emphasize Type A/C compatibility, compact dimensions, and pack quantity. A cartridge listing that names several brands is useful, but the physical dimensions remain the final compatibility check.
Setup and Handling Considerations
Replacement cartridges are handled through the existing filter housing, so the important preparation is identification rather than choosing a universal installation method. Record the old part number, housing model, cartridge count, and end-cap orientation before removing the old element. For a four-cartridge system, confirm that the replacement set contains the number of elements the housing uses.
Handle pleated media and molded end caps carefully during removal, rinsing, and installation. A cartridge that is too tall, too wide, or has the wrong opening configuration may not seat against the housing gasket. Small Type A/C cartridges are easy to confuse because several models share similar dimensions; compare the center opening and the pump model instead of relying on the filter’s general appearance.
Maintenance and Longevity
Cleaning should follow the filter manufacturer’s instructions and the condition of the system. Pentair’s published support guidance identifies 10 PSI above the starting pressure as a cleaning trigger for Clean & Clear Plus systems. That pressure-based approach is more useful for larger systems than applying a fixed calendar interval regardless of debris load or season.
Intex’s product information recommends replacing the 29002E every two weeks for maximum efficiency in the listed small above-ground pumps, and the 29000E listing gives a similar two-week replacement expectation. That cadence should not be transferred to the larger Unicel, POOLPURE, iLiving, In The Swim, or TOREAD cartridges. Cartridge systems are cleaned by removing and rinsing the element; the TOREAD listing specifically warns that its CCP420 replacement is not designed for backwashing.
Reliability Signals
The strongest reliability signals are a precise model match, complete dimensions, named cross-references, clear end-cap details, and construction information that relates to the actual housing. Unicel C-8412 is easy to evaluate because its dimensions, pleat count, media, and compatible models are all stated. The Intex OEM options are similarly straightforward when the pump model appears on the list.
Certification language deserves careful reading. Some aftermarket listings state NSF/ANSI 50 certification or IAPMO testing, but buyers should confirm that the claim applies to the exact cartridge variant rather than assuming that a certification associated with a filter family covers every replacement. Likewise, claims about longer life, fewer cleanings, or superior clarity are listing claims, not a reason to ignore fit or system pressure.
How to Compare Reviews
Give the most weight to comments that identify the exact cartridge model, filter housing, dimensions, and use case. A report about an Intex 29000E in a 1,000 GPH above-ground pump says little about a Unicel C-8412 in a Hayward C1200 housing. For CCP420 sets, look for discussion of the complete four-element replacement and whether the cartridge count matches the manifold.
Separate fit observations from performance claims. A report that the cartridge seated correctly, matched the end caps, or worked with a named pump is more useful for purchase decisions than a general statement that the water looked clear. Also consider the maintenance context: debris load, cleaning method, pressure changes, and replacement timing can affect results more than the brand name alone.
Common Mistakes
The most common mistake is buying by brand or square-foot rating without checking the old part number and dimensions. A 150-square-foot cartridge cannot replace a 120-square-foot cartridge simply because the filtration area is larger. The reverse problem occurs when a buyer selects a compact Type A/C cartridge for a full-size in-ground housing.
Other avoidable errors include confusing a four-element CCP420 set with a single cartridge, overlooking top and bottom opening differences, and assuming that a broad compatibility list guarantees a seal. Do not apply Intex’s two-week replacement guidance to every cartridge category, and do not backwash a cartridge that the product information says is not designed for backwashing. Finally, treat certification, durability, and clarity statements as product information to verify against the exact model, not as permission to skip fit checks.
Frequently Asked Questions
What should I check before ordering a replacement pool cartridge?
Check the old part number or exact filter model first. If it is unavailable, measure the complete end-to-end length, outside diameter, and the top and bottom opening configuration. Compare those measurements with the listing rather than relying on the brand name or filtration-area number alone.
Is a larger square-foot rating always better?
No. A larger rating usually indicates a different housing class, not a universal upgrade. The 120-square-foot and 150-square-foot cartridges in this comparison have different dimensions, while CCP420 systems use four dedicated elements. The cartridge must fit and seal in the existing housing.
Which filters are appropriate for Intex-style above-ground pumps?
The Intex 29002E and 29000E are the most direct choices when your pump model appears on their listed compatibility ranges. The POOLPURE PLF-INTA and U.S. Pool Supply FCA-4 offer broader Type A/C compatibility, but their center opening, dimensions, and exact pump model should still be checked.
How often should a cartridge be cleaned or replaced?
It depends on the system and debris load. Intex lists replacement every two weeks for the 29002E and gives similar guidance for the 29000E. Pentair’s Clean & Clear Plus support guidance uses a pressure increase of 10 PSI above the starting pressure as a cleaning trigger. Do not apply the small-pump schedule to every larger cartridge.
Can a CCP420 cartridge be backwashed?
No. The TOREAD TRF-7471 listing specifically says it is not designed for backwashing. CCP420 cartridges should be removed and rinsed according to the filter manufacturer’s instructions, and the replacement set must match the system’s four-element configuration.
Final Recommendation
The Unicel C-8412 is the best overall recommendation for a buyer with a matching Hayward C1200 or equivalent 120-square-foot housing because its physical dimensions, filtration area, pleat count, media, and cross-references are unusually clear. If your pool uses a listed Intex above-ground pump instead, the Intex 29002E Type A is the preferable alternative because it is the OEM-style match for those specific models and comes in a practical two-pack. Pentair CCP420 owners should choose a four-element set such as In The Swim WP.TS1977-4P rather than either single-cartridge option.
