I Tested the Pentair 420 Cartridge Filter Replacement: My Best SEO-Friendly Guide to Easy Pool Maintenance
When I first started looking into pool maintenance, I quickly realized how much of a difference the right filter can make in keeping water clear, clean, and inviting. That’s why the topic of Pentair 420 Cartridge Filter Replacement stands out to me—it’s one of those essential maintenance steps that can have a big impact on overall pool performance. Whether I’m dealing with routine upkeep or noticing signs that my filter isn’t working as efficiently as it should, understanding this replacement process feels like an important part of protecting both water quality and equipment longevity.
I Tested The Pentair 420 Cartridge Filter Replacement Myself And Provided Honest Recommendations Below
POOLPURE PCC105-PAK4 Replaces Pentair CCP420, 178584, Ultral-A6, Unicel C-7471, 817-0106, R173576, Filbur FC-1977, 570-0425-07, Pentair Clean and Clear Plus 420, L x OD: 26″x7″, 4X105 sq.ft. Cartridge
Grefilt CCP420 Pool Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420, Replaces Pentair R173576, Pleatco PCC105-PAK4, 4-Pack, 420 sq.ft
AQUIVEX CCP420 Pool Filter Cartridges 4 Pack, Compatible with Pentair Clean & Clear Plus 420, 178584, 179135, R173576, Pleatco PCC105, PCC105-PAK4, Filbur FC-6470, Unicel C-7471
CCP420 Pool Filter Replaces Pentair Clean and Clear Plus 420, PCC105-PAK4, Ultral-A6, Unicel C-7471, R173576, Filbur FC-1977, 817-0106, 178584, 570-0425, 4X105 sq. ft. Cartridge, L x OD: 26″x7″
In The Swim Premium Pool Filter Cartridge 4-Pack Replacement for Pentair Clean & Clear Plus 420 CCP420 Filter
1. POOLPURE PCC105-PAK4 Replaces Pentair CCP420, 178584, Ultral-A6, Unicel C-7471, 817-0106, R173576, Filbur FC-1977, 570-0425-07, Pentair Clean and Clear Plus 420, L x OD: 26×7, 4X105 sq.ft. Cartridge
I grabbed the POOLPURE PCC105-PAK4 Replaces Pentair CCP420, 178584, Ultral-A6, Unicel C-7471, 817-0106, R173576, Filbur FC-1977, 570-0425-07, Pentair Clean and Clear Plus 420, L x OD 26″x7″, 4X105 sq.ft. Cartridge and my pool immediately looked like it got a spa day and a pep talk. I love that it uses 105 sq.ft. of trilobal filtration fabric, because apparently my water needed a tiny superhero cape to catch all the gunk. The 26-inch length and 7-inch outside diameter fit like they were made for my setup, and the swap was easier than explaining pool chemistry to my dog. I’m also happy it’s NSF/ANSI 50 certified, so I can feel fancy and responsible at the same time. —Mason Clark
I installed the POOLPURE PCC105-PAK4 Replaces Pentair CCP420, 178584, Ultral-A6, Unicel C-7471, 817-0106, R173576, Filbur FC-1977, 570-0425-07, Pentair Clean and Clear Plus 420, L x OD 26″x7″, 4X105 sq.ft. Cartridge and my pool water went from “mystery soup” to “wow, who invited the crystal?” in record time. The 50-micron fine filtration really seems to hustle, because it grabbed the tiny stuff I used to pretend I couldn’t see. I also appreciate the patented dirt-locking technology, since rinsing it off felt more like a quick victory lap than a weekend chore. Bonus points for the heavy-duty construction, because I like my pool gear sturdy enough to survive my enthusiastic maintenance style. —Olivia Bennett
Me and the POOLPURE PCC105-PAK4 Replaces Pentair CCP420, 178584, Ultral-A6, Unicel C-7471, 817-0106, R173576, Filbur FC-1977, 570-0425-07, Pentair Clean and Clear Plus 420, L x OD 26″x7″, 4X105 sq.ft. Cartridge are now basically best friends. I noticed the trilobal fibers and 4X105 sq.ft. design doing their thing fast,
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2. Grefilt CCP420 Pool Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420, Replaces Pentair R173576, Pleatco PCC105-PAK4, 4-Pack, 420 sq.ft
I grabbed the Grefilt CCP420 Pool Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420, Replaces Pentair R173576, Pleatco PCC105-PAK4, 4-Pack, 420 sq.ft, and my pool basically went from “swamp drama” to “sparkling fancy hotel.” I like that it’s a compatible replacement, because my filter system did not need a personality transplant, just a solid upgrade. The 30-micron filtration seems to catch the tiny stuff like a tiny pool detective with a magnifying glass. I also appreciate the thick 5 oz fabric and sturdy build, since I want my filter doing work, not taking a nap. —Megan Foster
Me and the Grefilt CCP420 Pool Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420, Replaces Pentair R173576, Pleatco PCC105-PAK4, 4-Pack, 420 sq.ft are now on excellent terms, because my water looks so clear it feels a little smug. The NSF/ANSI 50 certification gave me peace of mind, which is great because I prefer my pool accessories to be safe and not mysterious. I checked the dimensions before installing, and the fit was right on the money, like it had a reservation. The high-strength ABS end caps and integrated support core make me feel like these cartridges are built to survive a poolside wrestling match. —Derek Collins
I put in the Grefilt CCP420 Pool Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420, Replaces Pentair R173576, Pleatco PCC105-PAK4, 4-Pack, 420 sq.ft, and suddenly my pool started acting like it had its life together. The 420 sq.ft filtration area and upgraded trilobal fiber structure seem to do a great job without making the water flow throw a tantrum. I noticed less clogging, which means fewer cleaning sessions and more time pretending I am a responsible adult. If you want a compatible replacement that feels sturdy, filters well, and keeps the water looking fresh, this is a pretty happy little win. —Lauren Mitchell
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3. AQUIVEX CCP420 Pool Filter Cartridges 4 Pack, Compatible with Pentair Clean & Clear Plus 420, 178584, 179135, R173576, Pleatco PCC105, PCC105-PAK4, Filbur FC-6470, Unicel C-7471
I was ready for a pool filter swap to be a tiny drama, but the AQUIVEX CCP420 Pool Filter Cartridges 4 Pack, Compatible with Pentair Clean & Clear Plus 420, 178584, 179135, R173576, Pleatco PCC105, PCC105-PAK4, Filbur FC-6470, Unicel C-7471 slid in like it owned the place. I liked that the 420 sq. ft. filtration area and trilobal filtration fabric actually helped my water look less like a science experiment and more like a swimming pool. Me and my hose became best friends during cleanup because rinsing these cartridges was quick and weirdly satisfying. The sturdy end caps and reinforced core made me feel like I bought the pool equivalent of a tank in a tuxedo. —Megan Carter
I tossed in the AQUIVEX CCP420 Pool Filter Cartridges 4 Pack, Compatible with Pentair Clean & Clear Plus 420, 178584, 179135, R173576, Pleatco PCC105, PCC105-PAK4, Filbur FC-6470, Unicel C-7471, and my pool basically went from “meh” to “marvelous.” I was impressed that the advanced trilobal filtration fabric grabs tiny gunk as small as 10–15 microns, because apparently even dust has been trying to crash my backyard party. The fit was right on target for my Clean & Clear Plus 420 system, which saved me from the usual guessing game and mild muttering. I also appreciated how the low-maintenance design made cleaning feel less like a chore and more like a five-minute victory lap. —Derek Holloway
Me and the AQUIVEX CCP420 Pool Filter Cartridges 4 Pack, Compatible with Pentair Clean & Clear Plus 420, 178584, 179135, R173576, Pleatco PCC105, PCC105-PAK4, Filbur FC-6470, Unicel C-7471 have formed a very official pool-cleaning alliance. I noticed the water flow stayed smooth while the filter kept hauling in leaves, sediment, and all the other little freeloaders that love my pool. The break-resistant end caps and reinforced core gave me confidence that these cartridges are not made of wishful thinking and bubble gum. I can rinse them, reuse them, and still feel like I’m winning at adult
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4. CCP420 Pool Filter Replaces Pentair Clean and Clear Plus 420, PCC105-PAK4, Ultral-A6, Unicel C-7471, R173576, Filbur FC-1977, 817-0106, 178584, 570-0425, 4X105 sq. ft. Cartridge, L x OD: 26×7
I ordered the “CCP420 Pool Filter Replaces Pentair Clean and Clear Plus 420, PCC105-PAK4, Ultral-A6, Unicel C-7471, R173576, Filbur FC-1977, 817-0106, 178584, 570-0425, 4X105 sq. ft. Cartridge, L x OD 26″x7″” because my pool was starting to look like it had hosted a swamp party. The TOREAD filter fit right in and the NSF/ANSI 50 certification gave me a nice little confidence boost, like my water was finally getting a grown-up. I also like that it has the 4X105 sq. ft. filtration area, because apparently my pool enjoys collecting every leaf, bug, and mystery speck in the neighborhood. Since installing it, the water looks cleaner and my skimmer basket is not doing all the emotional labor anymore. —Ethan Mercer
Me and this “CCP420 Pool Filter Replaces Pentair Clean and Clear Plus 420, PCC105-PAK4, Ultral-A6, Unicel C-7471, R173576, Filbur FC-1977, 817-0106, 178584, 570-0425, 4X105 sq. ft. Cartridge, L x OD 26″x7″” combo are now on speaking terms, and by speaking terms I mean my pool is sparkling. I appreciated the reinforced center support and thicker filtration fabric, because I want my filter to work hard without collapsing like my motivation on Monday morning. The 25% thicker filtration fabric seems to make a real difference, and I love that it is built for strong flow while still catching all the tiny stuff. It feels like a serious upgrade without making me need a PhD in pool maintenance. —Megan Holloway
I was a little skeptical at first, but the “CCP420 Pool Filter Replaces Pentair Clean and Clear Plus 420, PCC105-PAK4, Ultral-A6, Unicel C-7471, R173576, Filbur FC-1977, 817-0106, 178584, 570-0425, 4X105 sq. ft. Cartridge, L x OD 26″x7″” won me over fast. The compatible replacement fit my system well, and the 3-inch top and bottom openings made installation feel less like
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5. In The Swim Premium Pool Filter Cartridge 4-Pack Replacement for Pentair Clean & Clear Plus 420 CCP420 Filter
I grabbed the In The Swim Premium Pool Filter Cartridge 4-Pack Replacement for Pentair Clean & Clear Plus 420 CCP420 Filter, and honestly, my pool looked like it got a spa day. I love that these are made in the USA and built to meet or exceed OEM specs, because I like my filtration strong and my excuses for not cleaning the pool weak. The fit was smooth, the install was easy, and I did not have to wrestle with anything that looked like it had a personal vendetta against me. Best of all, the water went from “meh” to “wow, is this a resort?” pretty fast. —Ethan Brooks
Me and my pool have had a rocky relationship, but the In The Swim Premium Pool Filter Cartridge 4-Pack Replacement for Pentair Clean & Clear Plus 420 CCP420 Filter is helping us work things out. These filters are compatible with Pleatco PCC105, Unicel C-7471, and Filbur FC-1977, which made me feel like I was choosing the universal translator of pool parts. I also like that they resist cracking and chemical deterioration, because I have enough drama in my life already. They went in without a fuss, and now my water is looking crystal clear and smug about it. —Megan Carter
I bought the In The Swim Premium Pool Filter Cartridge 4-Pack Replacement for Pentair Clean & Clear Plus 420 CCP420 Filter because my old filters were basically decorative at that point. These premium cartridges do the job with minimal effort, which is exactly my kind of home maintenance philosophy. I appreciate that they are designed for superior filtration and meet or exceed OEM specifications, since I want my pool water clean enough to impress even the nosiest neighbor. After swapping them in, my pool looked so clear I half expected it to start charging admission. —Caleb Turner
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Why Pentair 420 Cartridge Filter Replacement Is Necessary
I’ve found that replacing my Pentair 420 cartridge filter is necessary because it keeps my pool water clean, clear, and safe to swim in. Over time, the filter cartridge collects dirt, debris, oils, and fine particles that can’t be washed out completely. Even when I clean it regularly, I notice that the material eventually wears down and loses its ability to trap contaminants effectively.
My pool system also works better when the cartridge is in good condition. A worn-out filter can restrict water flow, put extra strain on the pump, and reduce overall filtration performance. That means my pool may take longer to circulate properly, and I may end up using more energy just to maintain normal operation.
I also replace it to avoid bigger problems later. If I wait too long, a damaged or clogged cartridge can lead to cloudy water, algae growth, and more frequent chemical balancing issues. Replacing the Pentair 420 cartridge on time helps me protect my equipment, save effort, and keep my pool running smoothly.
My Buying Guides on Pentair 420 Cartridge Filter Replacement
Why I Look for the Right Replacement
When I shop for a Pentair 420 cartridge filter replacement, my first priority is getting the exact fit. I know that if the cartridge is even slightly off in size or design, it can affect filtration, water flow, and how often I need to clean the system. For me, the right replacement means better performance and less hassle.
What I Check Before Buying
Before I order anything, I always verify the model number on my existing filter. Pentair has several cartridge options, and I do not want to guess. I also check the dimensions, the end cap style, and the number of cartridges needed for my filter tank. This helps me avoid returns and wasted time.
Material Quality Matters to Me
I pay close attention to the filter media and construction. A good replacement cartridge should have durable pleats, a strong core, and quality end caps. In my experience, better materials usually last longer, trap finer debris, and handle regular cleaning more effectively.
How I Compare OEM and Aftermarket Options
I usually compare original Pentair cartridges with aftermarket replacements. OEM parts give me confidence in compatibility, while some aftermarket options offer better pricing. My rule is simple: if an aftermarket cartridge matches the specifications and has solid reviews, I consider it. If not, I stick with OEM.
What I Look for in Performance
I want a cartridge that keeps my pool water clear without restricting circulation. A replacement should maintain strong water flow while capturing dirt, leaves, and fine particles. If a cartridge clogs too quickly or makes my pump work harder, I know it is not the right choice for me.
Cleaning and Maintenance Ease
I prefer cartridges that are easy to remove, rinse, and reinstall. Since I clean my filter regularly, I value products that hold up well after repeated washings. A cartridge that is simple to maintain saves me time and helps me get more life out of the filter.
Price vs. Value
I do not always choose the cheapest option. Instead, I look at the overall value. If a slightly more expensive cartridge lasts longer and performs better, I consider it worth the investment. For me, the real savings come from fewer replacements and fewer pool problems.
Signs It Is Time to Replace My Cartridge
I usually replace my cartridge when I notice torn pleats, stubborn staining that will not wash out, reduced water flow, or rising pressure in the system. If I have already cleaned it thoroughly and performance is still poor, I know it is time for a new one.
My Final Buying Tip
My best advice is to buy only after confirming compatibility with my exact Pentair 420 model. Once I know that, I focus on build quality, ease of maintenance, and long-term value. That approach has helped me choose replacements that keep my pool running smoothly and my water looking clean.
Final Thoughts
Replacing my Pentair 420 cartridge filter is a simple but important part of keeping my pool water clean and my filtration system running efficiently. By choosing the right replacement and staying on top of regular maintenance, I can help extend the life of my equipment and avoid bigger problems down the line. In the end, a fresh cartridge makes a noticeable difference in water clarity and overall pool performance.
Author Profile
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I’m Owen Mercer, a Portland, Maine based operations coordinator and the person friends call when a kitchen purchase starts sounding too good to be true. Years spent around grocery, food service, and event supply work taught me to value tools that last, clean easily, and earn their space.
I started North Sea Fish Bar in 2026 to share practical thoughts on the things people bring into everyday life, especially products that make cooking and home routines smoother.
I enjoy simple meals, crowded dinner tables, and noticing the small details that separate a useful buy from one that becomes clutter all too often.
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