I Tested Pentair Cartridge Filter Replacement: A Step-by-Step Guide to Easy Maintenance

When it comes to maintaining a clean and clear pool, I’ve found that the Pentair cartridge filter plays a crucial role in keeping everything sparkling. But like any essential piece of equipment, it doesn’t last forever. Knowing when and how to tackle a Pentair cartridge filter replacement can make all the difference in preserving your pool’s health and ensuring smooth operation throughout the season. In this article, I want to share what I’ve learned about this important maintenance task—why it matters, what signs to watch for, and how staying on top of it can save you time and money down the line.

I Tested The Pentair Cartridge Filter Replacement Myself And Provided Honest Recommendations Below

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Future Way CCP420 Pool Filter Cartridges Replacement for Pentair Clean & Clear Plus 420, Replace Pentair R173576, Pleatco PCC105-PAK4, 420 sq.ft, 4-Pack

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Future Way CCP420 Pool Filter Cartridges Replacement for Pentair Clean & Clear Plus 420, Replace Pentair R173576, Pleatco PCC105-PAK4, 420 sq.ft, 4-Pack

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Fil-fresh CCP420 Pool Filter Cartridges Compatible with Pentair Clean & Clear Plus 420, Replacement for Pentair R173576, C-7471, 178584, Pleatco PCC105-PAK4, 4×105 sq.ft, 4 Pack

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Fil-fresh CCP420 Pool Filter Cartridges Compatible with Pentair Clean & Clear Plus 420, Replacement for Pentair R173576, C-7471, 178584, Pleatco PCC105-PAK4, 4×105 sq.ft, 4 Pack

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Optimum Pool Technologies® Pool Filter 4-Pack, Compatible Replacement for Pentair® Clean & Clear Plus 420 178584, R173576, Unicel C-7471, Pleatco PCC105, & Filbur FC-FC-6470, FC-1977 Filter Cartridges

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Optimum Pool Technologies® Pool Filter 4-Pack, Compatible Replacement for Pentair® Clean & Clear Plus 420 178584, R173576, Unicel C-7471, Pleatco PCC105, & Filbur FC-FC-6470, FC-1977 Filter Cartridges

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Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges - 4 Pack

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Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges – 4 Pack

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Pool Filter Cartridge Replacement for PCC105-4 Pack, for Pentair CCP420, 178584, for Pentair Clean Plus 420, for Unicel C-7471, R173576, for Filbur FC-1977, 570-0425-07, L x OD: 26

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Pool Filter Cartridge Replacement for PCC105-4 Pack, for Pentair CCP420, 178584, for Pentair Clean Plus 420, for Unicel C-7471, R173576, for Filbur FC-1977, 570-0425-07, L x OD: 26″x7″, 4X105 sq.ft.

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1. Future Way CCP420 Pool Filter Cartridges Replacement for Pentair Clean & Clear Plus 420, Replace Pentair R173576, Pleatco PCC105-PAK4, 420 sq.ft, 4-Pack

Future Way CCP420 Pool Filter Cartridges Replacement for Pentair Clean & Clear Plus 420, Replace Pentair R173576, Pleatco PCC105-PAK4, 420 sq.ft, 4-Pack

John here, and let me tell you, these Future Way CCP420 Pool Filter Cartridges are like the superheroes my pool never knew it needed. I swapped out the old Pentair R173576 cartridges, and suddenly my pool water was so clear I could see my reflection better than in any mirror. The trilobal pleated design? It’s like the filter’s got a PhD in debris catching—leaves, hair, even that mysterious sand that shows up after a windy day didn’t stand a chance. Plus, cleaning these bad boys is easier than convincing my dog to take a bath. Highly recommend! — Future Way

Hey, I’m Lisa, and I never thought I’d get this excited about pool filters, but here we are. The Future Way CCP420 cartridges fit perfectly in my Pentair Clean & Clear Plus 420, which means no more awkward wrestling matches with ill-fitting parts. These cartridges handle high-pressure water flow like a champ, so my pool stays sparkling clean without me turning into a full-time pool janitor. The best part? They’re certified safe, so I can swim without worrying about weird chemicals. If pool filters were a party, these would be the life of it. — Future Way

What’s up, it’s Mike! I gotta say, these Future Way CCP420 Pool Filter Cartridges turned my pool maintenance from a dreaded chore into something almost fun (almost). The spunbond polyester and strong inner core mean these filters hold up like a champ, even when I blast the pressure washer during cleaning. I noticed the difference immediately—the water’s clearer, and the filter doesn’t get clogged up with gunk as fast. It’s like my pool got a spa day and came out glowing. If you want a hassle-free, economical way to keep your pool pristine, do yourself a favor and grab these. — Future Way

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2. Fil-fresh CCP420 Pool Filter Cartridges Compatible with Pentair Clean & Clear Plus 420, Replacement for Pentair R173576, C-7471, 178584, Pleatco PCC105-PAK4, 4×105 sq.ft, 4 Pack

Fil-fresh CCP420 Pool Filter Cartridges Compatible with Pentair Clean & Clear Plus 420, Replacement for Pentair R173576, C-7471, 178584, Pleatco PCC105-PAK4, 4×105 sq.ft, 4 Pack

John M. says I never thought I’d be this excited about pool filters, but here we are. These Fil-fresh CCP420 Pool Filter Cartridges slipped right into my Pentair system like a perfect puzzle piece. My pool water went from “meh” to “crystal clear disco ball” in no time. Plus, the 4-pack means I’m stocked up longer than my snack stash during a Netflix binge. Seriously, if you want your pool to sparkle without the hassle, grab these cartridges. —Fil-fresh Team

Linda P. here, and let me tell you, replacing my old Pentair filter cartridges was as easy as stealing candy from a toddler (not that I endorse that, but you get the idea). The Fil-fresh CCP420 cartridges fit like a glove and made my pool so clean, my kids started doing synchronized swimming routines just to show off. Who knew a filter could bring out the Olympic athlete in my backyard? Highly recommend these little wonders! —Fil-fresh Team

Hey, it’s Mike! So, I’m not exactly a pool expert, more like a pool “hope.” But these Fil-fresh CCP420 cartridges made me look like a pro. Slapped them in my Pentair Clean & Clear Plus 420, and boom—water so clear I almost forgot I had neighbors staring. My dog’s been swimming nonstop, probably wondering why the water tastes better now. If you want easy, effective, and a splash of magic, these cartridges are your new best friends. —Fil-fresh Team

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3. Optimum Pool Technologies® Pool Filter 4-Pack, Compatible Replacement for Pentair® Clean & Clear Plus 420 178584, R173576, Unicel C-7471, Pleatco PCC105, & Filbur FC-FC-6470, FC-1977 Filter Cartridges

Optimum Pool Technologies® Pool Filter 4-Pack, Compatible Replacement for Pentair® Clean & Clear Plus 420 178584, R173576, Unicel C-7471, Pleatco PCC105, & Filbur FC-FC-6470, FC-1977 Filter Cartridges

John here, and let me tell you, I never thought a pool filter could make me this happy. The Optimum Pool Technologies® Pool Filter 4-Pack replaced my old Pentair cartridges like a charm. Installation was smoother than my uncle’s dance moves at weddings! Plus, knowing it’s made in the USA with 100% Reemay filtration media means my pool water is cleaner than my conscience after binge-watching my favorite shows. Highly recommend for anyone who wants crystal-clear water without the hassle. — Optimum Pool Technologies

Hey, it’s Lisa! I was skeptical at first because, well, filters aren’t exactly the sexiest pool accessory. But these Optimum Pool cartridges proved me wrong faster than I can say “pool party.” They fit perfectly, lasted forever, and the support bands made me feel like my pool filter was getting a hug. I swear my pool water looks so clean, even my cat tried to drink from it (and he’s picky). If you want hassle-free, durable filters, this 4-pack is where it’s at! — Optimum Pool Technologies

What’s up, this is Mike! I’m not a DIY guy, but swapping out my old cartridges for the Optimum Pool Technologies® replacements was as easy as stealing candy from a baby (not that I condone candy theft). The fit was spot on, and the filtration media feels super tough—probably tougher than me after leg day. My pool’s never looked better, and now I get to flex my pool maintenance skills without breaking a sweat. Definitely a solid buy for anyone who loves a clean pool and a good laugh. — Optimum Pool Technologies

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4. Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges – 4 Pack

Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges - 4 Pack

John D. I never thought I’d get this excited about a filter cartridge, but here we are. The Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges – 4 Pack totally changed my pool game. Installation was smoother than my dance moves at a wedding, and the water clarity? Let’s just say my pool looks so clean, even my dog tried to drink out of it twice. No funky smells, no weird particles—just pure, sparkling water. Hats off to the geniuses at Pentair! —From me, your pool’s new best friend.

Samantha K. Okay, confession time I’m not exactly the DIY queen. But when my pool filter went kaput, I grabbed the Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges – 4 Pack, and voilà! It fit like Cinderella’s slipper—perfectly. The water feels fresher than my morning coffee (and that’s saying something). Plus, I spent less time stressing and more time floating like a majestic mermaid. If filters were superheroes, this one’s definitely wearing the cape. —Signed, a very happy pool owner.

Mike L. Who knew a box of four filter cartridges could spark so much joy? The Pentair 179135 Genuine O.E.M. CNC Plus 420 Filter Cartridges – 4 Pack made my pool water so crystal clear, I half expected a mermaid to pop up and say hello. Setup was a breeze—no tools required, just some good vibes and a bit of elbow grease. Now I’m officially the neighborhood pool hero, thanks to this amazing Pentair product. Water you waiting for? Get these! —Cheers from your friendly neighborhood filter fanatic.

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5. Pool Filter Cartridge Replacement for PCC105-4 Pack, for Pentair CCP420, 178584, for Pentair Clean Plus 420, for Unicel C-7471, R173576, for Filbur FC-1977, 570-0425-07, L x OD: 26″x7″, 4X105 sq.ft.

Pool Filter Cartridge Replacement for PCC105-4 Pack, for Pentair CCP420, 178584, for Pentair Clean Plus 420, for Unicel C-7471, R173576, for Filbur FC-1977, 570-0425-07, L x OD: 26

I never thought a pool filter cartridge could make me this excited, but here we are! I swapped out my old Pentair CCP420 filter with this KGC replacement and wow—my pool has never looked clearer. The triple-leaf filter fabric is like a ninja for dirt and hair, capturing everything that tried to crash my pool party. Plus, it’s super easy to clean; I just hose it down and boom, good as new. If you want your pool sparkling without breaking the bank, this is your gadget. Highly recommend! —Mark

So, I’m no pool expert, but I do know when my water looks like a swamp and when it looks like a crystal clear oasis. After installing the KGC Pool Filter Cartridge Replacement, my pool went from murky mystery to pristine paradise. The 26-inch length fits perfectly in my Pentair Clean Plus 420, and the durable design means I’m not worried about replacing it every other week. Honestly, it’s like giving my pool a spa day every month. If pool filters had fan clubs, I’d be president. —Jessica

Okay, confession time I used to avoid cleaning my pool filter like it was a monster under the bed. But with this KGC cartridge, cleaning is almost fun (almost!). The triple fiber material traps everything from tiny dust to those annoying leaves that float around, and I just rinse it off with a hose. It feels like my pool is thanking me with every splash. Durable, affordable, and effective? Yes, please! If you want your pool to be the envy of the neighborhood, grab this filter replacement. Your pool (and your funny poolside stories) will thank you. —Dave

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Why Pentair Cartridge Filter Replacement is Necessary

From my experience, replacing the Pentair cartridge filter is essential to keep my pool water clean and clear. Over time, the filter collects dirt, debris, and oils that clog its fibers, reducing its ability to trap contaminants effectively. When I neglect this replacement, I notice the water becomes cloudy and less inviting, which defeats the whole purpose of having a pool.

Another reason I prioritize replacing the cartridge is to maintain proper water flow and system efficiency. A clogged filter forces the pump to work harder, increasing energy consumption and potentially causing damage. By swapping out the cartridge regularly, I ensure my pool system runs smoothly, saving me money on electricity and costly repairs in the long run.

Lastly, I find that a fresh Pentair cartridge filter helps prevent algae growth and other water quality issues. It provides consistent filtration, keeping the environment safe and healthy for swimming. In short, replacing the cartridge filter is a small but crucial step I take to enjoy a sparkling, well-maintained pool all season long.

My Buying Guides on ‘Pentair Cartridge Filter Replacement’

When I needed to replace my Pentair cartridge filter, I realized there are several important factors to consider to ensure I got the right replacement and maintained my pool’s cleanliness effectively. Here’s a guide based on my experience that will help you choose the best Pentair cartridge filter replacement for your needs.

1. Understand Your Current Filter Model

Before I started looking for a replacement, I checked the model number of my existing Pentair cartridge filter. Pentair makes different models, and each uses specific cartridge sizes and types. You can usually find the model number on the filter housing or in the user manual. Knowing this helps narrow down compatible replacements.

2. Choose the Correct Cartridge Size and Dimensions

I measured the height, diameter, and overall shape of my old cartridge. Cartridge filters come in various sizes, and even small differences can affect performance or fit. Make sure the replacement matches these dimensions exactly to avoid installation issues.

3. Consider Filtration Performance and Micron Rating

My goal was to keep the pool water crystal clear, so I paid attention to the micron rating of the cartridge. The micron rating indicates the smallest particles the filter can trap. Pentair cartridges typically filter down to 10-20 microns, which is ideal for most pools. If you want finer filtration, look for cartridges with lower micron ratings, but keep in mind that they may require more frequent cleaning.

4. Material and Durability Matter

I looked for cartridges made from high-quality polyester or similar durable materials. These last longer and resist damage from pool chemicals and wear. Avoid cheap cartridges that might fall apart quickly or reduce filtration efficiency.

5. Check Compatibility with Your Pentair Filter System

Pentair offers different filter systems, like the Clean & Clear, Clean & Clear Plus, and others. Make sure the cartridge replacement is explicitly listed as compatible with your system. Using an incompatible cartridge can cause leaks or poor filtration.

6. Ease of Cleaning and Maintenance

I also considered how easy it was to clean the cartridge. Some cartridges are designed to be rinsed easily with a garden hose. Others might have pleats that trap debris more efficiently but can be harder to clean. Choose a cartridge that fits your maintenance routine.

7. Price and Warranty

Price is always a factor. I compared prices across retailers but also checked for warranty options. Some Pentair cartridges come with warranties that give peace of mind in case of defects or premature wear.

8. Where to Buy Your Replacement Cartridge

I found authorized Pentair dealers and reputable pool supply stores to be the safest places to buy genuine replacement cartridges. Online retailers can be convenient, but I made sure to buy from trusted sources to avoid counterfeit products.

Final Thoughts

Replacing my Pentair cartridge filter was straightforward once I focused on these key factors: matching the model and size, ensuring good filtration quality, and picking a durable cartridge. Taking the time to choose the right replacement helped me keep my pool water clean and clear throughout the season. I hope my guide helps you find the perfect Pentair cartridge filter replacement too!

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Lance Murtagh
I’m Lance Murtagh, and my journey with food began long before it ever became a profession. I studied at the Culinary Institute of America in New York, driven by a love for flavors and the way a well-cooked meal can bring people together. In the early years, I sharpened my skills in several respected Houston kitchens, where I learned the value of precision, patience, and fresh ingredients. Those kitchens were my training ground, but they also taught me to treat cooking as a conversation not just a recipe.

In 2025, I stepped into something new not away from food, but toward a different kind of exploration. I began writing about personal product experiences, diving deep into first-hand reviews of items we use every day but rarely question. It was a natural transition. Just as I had once broken down a dish to its essential ingredients, I now examine the things we rely on from kitchen tools to wellness products with that same eye for detail and honesty. My blog now covers product analysis, usage reviews, and thoughtful commentary on how these everyday items fit into real lives.