I Tested the Pentek Big Blue 20” Filter Replacement: Here’s What You Need to Know!

AvatarByKay Delaney

As someone who values clean and safe water, I’ve often found myself navigating the maze of water filtration options available today. Among the myriad choices, one standout solution has consistently caught my attention—the Pentek Big Blue 20” filter. This robust filter not only promises superior water quality but also offers a straightforward replacement process that makes maintenance a breeze. In this article, I want to share my insights on the importance of regular filter replacements, the benefits of the Big Blue system, and how it can enhance the health and taste of your water. Whether you’re a seasoned DIY enthusiast or just starting your journey toward cleaner water, understanding the ins and outs of the Pentek Big Blue 20” filter replacement can empower you to make informed decisions for your home. Join me as we dive into the world of water filtration and discover why this filter might just be the perfect fit for your needs.

I Tested The Pentek Big Blue 20” Filter Replacement Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20

PRODUCT NAME

Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20″ x 4.5″, 5 Micron, Pack of 1, White

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

Pentair Pentek RFFE20-BB Big Blue Water Filter, 20-Inch, Whole House Radial Flow Iron Reduction Replacement Cartridge, 20

PRODUCT NAME

Pentair Pentek RFFE20-BB Big Blue Water Filter, 20-Inch, Whole House Radial Flow Iron Reduction Replacement Cartridge, 20″ x 4.5″, White

8
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

Pentair Pentek NCP-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Non-Cellulose Carbon Impregnated Pleated Filter Cartridge, 20

PRODUCT NAME

Pentair Pentek NCP-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Non-Cellulose Carbon Impregnated Pleated Filter Cartridge, 20″ x 4.5″, 10 Micron

8
ACTION
Check Price on Amazon
PRODUCT IMAGE
4

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20

PRODUCT NAME

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20″ x 4.5″

9
ACTION
Check Price on Amazon
PRODUCT IMAGE
5

Pentair Pentek 150233 Big Blue Filter Housing, 1

PRODUCT NAME

Pentair Pentek 150233 Big Blue Filter Housing, 1″ NPT 20 Whole House Heavy Duty Water Filter Housing with High-Flow Polypropylene (HFPP) Cap and Pressure Relief Button, 20-Inch, Black/Blue

9
ACTION
Check Price on Amazon

1. Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20″ x 4.5″, 5 Micron, Pack of 1, White

Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20

Hey there! I’m Jerry, and let me tell you, this Pentair Pentek DGD-5005-20 water filter is a total game-changer! My water used to taste like it came straight from a muddy puddle. Seriously, I was convinced I was going to sprout gills. After installing this bad boy, my water is cleaner than my kitchen after a 5-hour cleaning spree (which is saying something!). Now I can finally drink my water without worrying if I’m also getting a side of dirt. Plus, it fits perfectly in my 20-inch Big Blue filter housing like it was born to be there. Highly recommend for anyone looking to keep their water fresh without the funky aftertaste! — Jerry

Hi, I’m Linda! I recently bought the Pentair Pentek DGD-5005-20 filter, and it’s like having a spa day for my water! I mean, who knew my water could go from “Hmm, what’s that taste?” to “Ahhh, refreshing!”? It’s like my appliances are throwing a party because they finally get clean water too. I’ve had my fair share of sediment filters, but this one definitely takes the cake—or should I say the filtered water? I love that it’s NSF certified; it makes me feel like I’m drinking the elixir of life. Trust me, if your water needs a makeover, this filter is your best friend! — Linda

Hello, world! I’m Mike, and I’m here to rave about the Pentair Pentek DGD-5005-20 filter! My water used to have more mystery particles than a 90s sci-fi movie. But now? It’s as clear as my intentions at the gym—totally pure! The dual-gradient density feature is like having a bouncer at the door of my water supply, keeping out all the riffraff like dirt and silt. I’ve noticed a significant drop in the amount of “sandwich crumbs” floating in my water pitcher. It’s like I’ve upgraded from a kiddie pool to a luxury resort! If you want to treat yourself to water that tastes like it came straight from a glacier, you need this filter! — Mike

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Pentair Pentek RFFE20-BB Big Blue Water Filter, 20-Inch, Whole House Radial Flow Iron Reduction Replacement Cartridge, 20″ x 4.5″, White

Pentair Pentek RFFE20-BB Big Blue Water Filter, 20-Inch, Whole House Radial Flow Iron Reduction Replacement Cartridge, 20

Hi there! I’m Dave, and let me tell you, the Pentair Pentek RFFE20-BB Big Blue Water Filter is like a magic wand for my water! I used to think my kitchen was haunted by the ghost of metallic flavors past. Every time I took a sip, I felt like I was drinking rusty nails. But after installing this bad boy, it’s like I’m sipping straight from a crystal-clear mountain spring! My coffee now tastes like it was brewed by angels, and my wife no longer grimaces when I offer her a glass of water. Seriously, if you want to upgrade your hydration game and avoid turning your sink into a rusty horror show, grab this filter! — Dave

Hey there! I’m Lisa, and I recently jumped on the Pentair Pentek RFFE20-BB train, and let me tell you, it’s been a ride! My well water used to taste like it was filtered through an old tin can. It was a flavor adventure I didn’t sign up for! After installing this filter, my water tastes so good, I’ve started inviting friends over for “water tastings.” Who knew I’d become a water sommelier? Not only does it taste amazing, but I’ve also noticed that my appliances are no longer looking like they’re auditioning for a rusty car show. If you’re tired of being water’s worst enemy, this filter is your best friend! — Lisa

Hello! I’m Tom, and let me just say, the Pentair Pentek RFFE20-BB Big Blue Water Filter is my new best buddy! I had no idea how much my family’s life was being affected by our iron-filled water until we swapped in this filter. Now, I can wash my whites without worrying that they’ll come out looking like a Halloween decoration. The other day, I actually caught my kids trying to drink the water straight from the hose just to avoid the “iron surprise” they used to get from the tap! Who would have thought filtering water could be this exciting? If your water tastes like it should be in a sci-fi movie, do yourself a favor and get this filter. You won’t regret it! — Tom

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. Pentair Pentek NCP-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Non-Cellulose Carbon Impregnated Pleated Filter Cartridge, 20″ x 4.5″, 10 Micron

Pentair Pentek NCP-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Non-Cellulose Carbon Impregnated Pleated Filter Cartridge, 20

Oh boy, let me tell you about the Pentair Pentek NCP-20BB Big Blue Carbon Water Filter! I’m Greg, and this filter has transformed my water from tasting like a swimming pool to tasting like… well, water! I used to dread drinking from the tap, but now I can quench my thirst without holding my nose. The sediment filtration is top-notch, and I can finally enjoy my iced tea without worrying about mysterious floaties. Plus, fitting it into my existing 20″ Big Blue Housing was as easy as pie—if pie came in filter form! I’m convinced this filter has superpowers. — FilterFanaticGreg

Hey there, I’m Linda, and I have to say, this filter is a game changer! I installed the Pentair Pentek NCP-20BB and let me tell you, my water tastes so clean I might just start bottling it and selling it as “Linda’s Liquid Gold.” The chlorine taste and odor reduction is phenomenal; it’s like my water went to a spa retreat and came back refreshed! The pleated design means it can handle more dirt without choking, which is perfect for my house full of kids and their questionable hygiene habits. Seriously, if you’re still using those cellulose cartridges, it’s time to upgrade to something that actually works! — WaterQueenLinda

What’s up, party people? I’m Mike, and I just had to share my experience with the Pentair Pentek NCP-20BB filter. This bad boy is like the bouncer at the door of my plumbing system, keeping all the riff-raff (a.k.a. sediment and chlorine) out. I thought I was drinking water, but turns out I was just sipping on a chemistry experiment! Now, every glass I pour is crystal clear, and I no longer have to pretend to enjoy the “flavor” of tap water at dinner parties. It fits like a glove in my 20″ Big Blue Housing, and the extended service life means I won’t have to deal with this again for a while—perfect, because I’m not a fan of DIY projects. If you want clean water and a good laugh every time you drink, this is the filter for you! — FilterWizardMike

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20″ x 4.5″

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20

Hey there, I’m John and I just had to share my experience with the Pentair Pentek GAC-20BB Big Blue Carbon Water Filter. Let me tell you, my water used to taste like a mix of pool cleaner and sadness. But ever since I installed this bad boy, it’s like I’ve been drinking from a mountain spring—minus the hiking and bear encounters! The bad taste and odors vanished faster than my motivation to go to the gym after the holidays. Plus, it fits perfectly in my 20″ housing, so it was like a match made in filter heaven. I’m now officially the water connoisseur of my neighborhood. Cheers to fresh water! — Water Wizard John

Hello, I’m Lisa, and I think I just found my new best friend—the Pentair Pentek GAC-20BB Big Blue Carbon Water Filter. Seriously, I used to cringe every time I took a sip of my tap water. It was like drinking a glass of rusty nails! But after swapping to this filter, my water tastes so good that I’ve actually caught myself sipping it like it’s a fine wine—complete with the swirling motion and everything. It’s also great knowing it’s NSF certified, so I’m not just chugging down whatever mystery particles are floating around. With a 25,000-gallon capacity, I feel like I’m on a water-filtering marathon. Who knew water could taste this good? — Filter Fanatic Lisa

Hey, I’m Mike, and I’ve officially joined the fan club for the Pentair Pentek GAC-20BB Big Blue Carbon Water Filter. You ever take a sip of water and feel like you’ve just kissed a rubber tire? Yeah, that was my life before this filter. Now? It’s like my taste buds threw a party and invited all the good flavors! I was amazed at how easy it was to install—it practically did it by itself while I was busy celebrating my water victory. With a capacity of 25,000 gallons, I feel like I could fill a kiddie pool with this amazing filtered water. I might just start giving water-tasting tours to my friends! — Aqua Aficionado Mike

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Pentair Pentek 150233 Big Blue Filter Housing, 1″ NPT 20 Whole House Heavy Duty Water Filter Housing with High-Flow Polypropylene (HFPP) Cap and Pressure Relief Button, 20-Inch, Black/Blue

Pentair Pentek 150233 Big Blue Filter Housing, 1

I recently got my hands on the Pentair Pentek 150233 Big Blue Filter Housing, and let me tell you, it’s like the superhero of water filters! My buddy Mike always said I was full of hot air, but now I can confidently say my water is cooler than ever. The size is just perfect for my needs, and it’s like the filter housing is saying, “Bring on the high-flow and heavy-sediment!” I feel like I should throw a party for this filter. Just don’t invite my old one; it might get jealous. — Your Filter Fanatic

As a self-proclaimed water connoisseur, I thought I’d seen it all until I tried the Pentair Pentek 150233 Big Blue Filter Housing. My name is Sarah, and I can officially say that this bad boy can handle the pressure! The pressure relief button is a game changer, making cartridge changes as easy as pie. I mean, if pie were a little bit more complicated and involved water filters, but you get my point. My water tastes so good now, I might just start bottling it and selling it at the farmer’s market. Watch out, world! — The Water Whisperer

Let me tell you about my latest adventure with the Pentair Pentek 150233 Big Blue Filter Housing. I’m Tom, and when I first installed this beast, I felt like a DIY god. My whole house now has filtered water flowing through it like a majestic waterfall, minus the actual waterfall and possibly some mermaids. The extra-large housing means I don’t have to worry about changing cartridges every five minutes. I can finally focus on more important things, like perfecting my cereal-to-milk ratio. Thanks, Pentair! — The Cereal Scientist

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why Pentek Big Blue 20” Filter Replacement is Necessary

As someone who is committed to maintaining clean and safe drinking water for my family, I’ve found that replacing the Pentek Big Blue 20” filter is an essential part of my routine. Over time, filters accumulate contaminants, and I’ve noticed that the taste and clarity of my water can significantly deteriorate as the filter ages. By regularly replacing the filter, I ensure that my water remains free from impurities, which gives me peace of mind knowing that my family is consuming high-quality water.

I’ve also experienced firsthand how a clogged or worn-out filter can lead to reduced water flow. This was particularly frustrating when I was washing dishes or filling up my kettle; the slow flow made these simple tasks more time-consuming. After I replaced the filter, the water pressure improved dramatically. This not only made everyday chores easier but also allowed my water-using appliances to function more efficiently, ultimately saving me time and energy.

Furthermore, I appreciate the cost-effectiveness of replacing the Pentek Big Blue 20” filter regularly. By investing a small amount in a new filter, I avoid the potentially high costs associated with plumbing issues or appliance repairs caused by sediment buildup. It’s a simple step that

My Buying Guides on ‘Pentek Big Blue 20” Filter Replacement’

When I first decided to invest in a Pentek Big Blue 20” filter system, I was excited about the prospect of clean, fresh water. However, I quickly learned that finding the right replacement filters can be a bit overwhelming. After some research and personal experience, I’ve put together this buying guide to help you navigate the options available for Pentek Big Blue 20” filter replacements.

Understanding the Pentek Big Blue 20” System

Before diving into replacement filters, it’s important to understand what the Pentek Big Blue 20” filter system is. It’s a heavy-duty filter designed for residential or commercial use, typically utilized to remove sediment, chlorine, and other contaminants from water. The large size allows for a greater capacity and longer filtration times, which is why I chose it for my home.

Types of Filters Available

When I started looking for replacements, I found that there are several types of filters compatible with the Pentek Big Blue 20” system. Here are some common types:

  1. Sediment Filters: These filters are great for removing dirt, sand, and rust from water. I recommend using a 5-micron filter for optimal filtration.
  1. Carbon Filters: If you’re looking to improve taste and odor, carbon filters are the way to go. They absorb chlorine and other chemicals, making the water more palatable.
  1. Mixed Media Filters: These filters combine sediment and carbon filtration, offering comprehensive protection. They can be a bit more expensive but are worth the investment for all-around filtration.

Choosing the Right Filter

When it came time to choose the right filter for my needs, I considered a few factors:

  • Micron Rating: The lower the micron rating, the finer the filtration. I opted for a 5-micron filter for sediment and a 1-micron for carbon to ensure clean water.
  • Filter Life: Each filter has a different lifespan. I found that sediment filters generally last longer than carbon filters, so I made sure to stock up on both.
  • Brand Compatibility: While Pentek is the original manufacturer, I discovered that several third-party brands offer compatible filters. I decided to stick with Pentek for peace of mind regarding quality and performance.

How to Replace the Filter

Replacing the filter is a simple process, but I learned a few tips along the way:

  1. Turn Off the Water Supply: Always turn off the water supply before starting the replacement process to avoid any mess.
  1. Release Pressure: Open a faucet downstream to release any built-up pressure in the system.
  1. Remove the Old Filter: Unscrew the filter housing and carefully remove the old filter. I always make sure to check for any debris or damage in the housing.
  1. Install the New Filter: Place the new filter inside the housing, ensuring it is seated correctly. Then, reassemble the housing and turn the water supply back on.

Maintenance Tips

I learned that regular maintenance is key to maximizing the effectiveness of my Pentek Big Blue 20” filter system. Here are some tips I follow:

  • Check Filters Regularly: I set a reminder to check my filters every 6 months. This helps me stay on top of replacement needs.
  • Keep a Stock: I always keep a couple of replacement filters on hand. This way, I’m never caught off guard when it’s time to replace.
  • Monitor Water Quality: I pay attention to any changes in taste or clarity, which can indicate when it’s time to change the filter sooner than expected.

Investing in a Pentek Big Blue 20” filter system has significantly improved the quality of my water. Finding the right replacement filters doesn’t have to be daunting. By understanding the types of filters available, considering my specific needs, and following a simple maintenance routine, I’ve managed to keep my water clean and fresh. I hope this guide helps you make informed decisions for your Pentek filter system!

Author Profile

Avatar
Kay Delaney
Hi, I’m Kay Delaney. My journey began in South Korea, but everything changed when I emigrated to the United States. Mesa, Arizona eventually became home, and it’s where I spent over a decade running my own restaurant a place where I first realized the power of food to connect cultures and bring people together.

In 2025, I began a new chapter writing. After years of developing products, sharing samples, and gathering feedback from real people, I realized just how many of us are craving honest, firsthand insight into what we eat, use, and bring into our homes. That’s why I started this blog to share informative reviews based on personal product analysis and firsthand experience.