Pentek

Pentair Pentek RFC-20BB Big Blue Carbon Water Filter 20-Inch Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge

64+ bought in the past month

$100.16

About this item

  • CLEANER, BETTER-TASTING WATER: Effectively reduces chlorine taste and odor, sediment, and other contaminants for improved water quality throughout your entire home
  • HIGH-PERFORMANCE DESIGN: Unique radial flow technology ensures low pressure drop and minimal carbon fines, providing efficient filtration without sacrificing water pressure
  • LONG-LASTING FILTRATION: 100,000 gallon capacity offers up to one year of whole house water filtration before replacement is needed
  • VERSATILE COMPATIBILITY: Fits standard 20" Big Blue filter housings and replaces most 20" x 4.5" carbon cartridges for easy installation and maintenance
  • CERTIFIED QUALITY: NSF/ANSI Standard 42 certified for material safety and structural integrity, ensuring reliable performance and peace of mind
$100.16

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Product details

MaterialGranular Activated Carbon
Product Dimensions4.5"D x 4.5"W x 20"H
Item Weight2.5 Pounds
External Testing CertificationNSF, ANSI
Product BenefitsRemoves Odor

Technical specifications

materialGranular Activated Carbon
product_dimensions4.5"D x 4.5"W x 20"H
item_weight2.5 pounds
external_testing_certificationNSF, ANSI
product_benefitsRemoves Odor
brandPentek
eu_spare_part_availability_duration1 Years
upc051678247433
global_trade_identification_number00051678247433
unit_count1 Count
number_of_items1
manufacturerPentair Industries
part_number155247-43
item_model_numberRFC20-BB
is_discontinued_by_manufacturerNo
sizePack of 1
colorWhite
style20" x 4.5"
patternWater Filter
item_package_quantity1
number_of_pieces1
certificationNSF
batteries_includedNo
batteries_requiredNo
national_stock_number4610-01-570-6746
best_sellers_rank#9,406 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #84 in Replacement Under-Sink Water Filters
date_first_availableNovember 9, 2004

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Customer reviews

4.71,034 ratings

Customers say

Customers find the water filter works well, with one mentioning it effectively removes chlorine from city water, and another noting it helps with sulfur and iron well water. Customers disagree on the value for money, with some finding it economical while others consider it pricey.

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The best filter ever!

NHβ€”April 19, 2025βœ“ Verified purchase

I was able to order this filter originally through Vine. It was the best filter we've used to date, so I went to Amazon and purchased another, just to make sure we always have one on hand. Our vacation place is on the VA coast and anyone who has lived near the water knows how skanky well water can be near the coast. This filter is truly exceptional. Our water has never tasted better. It immediately got rid of that low-tide smell typical of water in our area. We've tried paper filters, carbon filters and magnesium filters. This filter is what we had been needing. So glad I was introduced to it via Vine. I will continue to purchase more through Amazon Prime. Pricey but worth it! Read more

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Does the job

CAβ€”November 2, 2025βœ“ Verified purchase

Arrived great condition and works well as a replacement filter. Read more

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water filter

donβ€”December 14, 2025βœ“ Verified purchase

excellent product Read more

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Reliable wuality

jane galvanβ€”February 10, 2026βœ“ Verified purchase

I rely on the effectiveness of this product to keep my well hard water nice and soft. It's great for my laundry and whole house water quality. I've been using it for several years Read more

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Its a game changer

Spidermanβ€”December 17, 2025βœ“ Verified purchase

The house water tasted better immediately Read more

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Whole house filtration system

Heli Chiefβ€”November 5, 2015βœ“ Verified purchase

I just finished installing a complete whole house water filtration system. I used only pentek filters and housings. I'm very happy with the performance of my system and how well it all went together. Here's a breakdown of the all the components I used in my system. I went to great length researching what works and found it wasn't easy going thru each pentek filter and it's function. The goal was to reduce some sediment, iron deposits from old iron pipes and remove any chemical taste. The water tastes great now and is crystal clear. Components: -Pentek Big Blue 20" Filter Housings -Housing Bracket for Big blue 10" and 20" filter Filters IN ORDER: 1-Pentek DGD-2501-20 Spun Polypropylene Filter 20 micron dual stage to 1 micron. 2-Pentek 155263, RFFE20-BB Radial Flow Iron Removing Filter 3-Pentek RFCC-BB Carbon Filter you can add another Filter after the Carbon for media if you want. Not necessary but is an option or run 2 sediment filters in beginning of the system. -Various copper pipes and PVC pipes to build the system. I highly recommend a bypass valve and a way to shut off the water to your filters if you need to change them without losing water pressure to the house. -I experienced nearly 0 PSI drop thru the 3 filters and no noticeable change in flow rate. Read more

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Great Quality, Clean Water

James DeLorenzoβ€”March 28, 2024βœ“ Verified purchase

I have a hard iron well, this filter is in place before the softener and it works very well. I change my filter every 4 months. When I swap again I'll update with pictures but this filter does what it is supposed to with very little to no water restriction. Pentair has another similar charcoal filter GAC blue solid body and the water restriction is horrible. This filter works very well. Definitely recommend! No smell, no color. This can also be used in a singular or in line filter system with no water restriction. Read more

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Does the job, removing taste and odor from our well water

Steven Douglas Badourβ€”December 23, 2024βœ“ Verified purchase

A little expensive but worth the cost as it does remove all taste and odor from our well water. Read more

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