Pentek

Pentair Pentek EP-20BB Big Blue Carbon Water Filter 20-Inch Whole House Carbon Block Replacement Cartridge with Bonded Powdered

522+ bought in the past month

$82.59

About this item

  • GREATER CHLORINE TASTE and ODOR REDUCTION than competitive 10 carbon blocks
  • FITS ALL 20" Big Blue or other heavy duty housings and can replace any 20" x 4.5" carbon filter cartridge
  • HIGH POROSITY DESIGN helps the cartridge from plugging before its adsorption capacity is exhausted
  • NSF INTERNATIONAL tested and certified for your peace of mind
  • 44,000 GALLON CAPACITY. Replace every year or when you notice a drop in water pressure or water quality
$82.59

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Product details

MaterialExtruded Carbon Block
Product Dimensions4.63"D x 4.63"W x 20"H
Item Weight5.65 Pounds
External Testing CertificationNSF, ANSI
Product BenefitsReduces Chlorine, Removes Odor

Technical specifications

materialExtruded Carbon Block
product_dimensions4.63"D x 4.63"W x 20"H
item_weight5.65 pounds
external_testing_certificationNSF, ANSI
product_benefitsReduces Chlorine, Removes Odor
brandPentek
eu_spare_part_availability_duration1 Years
set_nameWhole House Water Filter Set
upc851905131050 700999877941 798527517490 132017513058 163121152147 163120790494 806294984510 115971047135 851905125257 851905125202 182682388031 809390003468 115971035729 051678583432 808112760696 807032972783
global_trade_identification_number00051678583432
unit_count1 Count
number_of_items1
manufacturerPentair Industries
part_number155583-43
item_model_numberEP-20BB
is_discontinued_by_manufacturerNo
sizePack of 1
colorWhite
style20" x 4.5"
patternFilter
item_package_quantity1
number_of_pieces1
certificationNSF
batteries_includedNo
batteries_requiredNo
best_sellers_rank#13,114 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #116 in Replacement Under-Sink Water Filters
date_first_availableFebruary 19, 2008

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Customer reviews

4.71,040 ratings

Customers say

Customers find the water filter effective at removing sediment, chlorine, and eliminating chlorine taste and odor.

★★★★★

These filters work flawlessly.

R FJanuary 27, 2026✓ Verified purchase

I have been ordering the Pentair Pentek EP-10 Carbon Water Filter, 10-Inch .5 micron for a few years. This product performs as expected and has a consistent performance time range that I appreciate. I've come to be able to install them fairly easily and I change them without excessive effort! Thank you for a great product and the confidence of keeping my water system clean & clear of minerals & contaminants. Read more

★★★★★

Great filters and great price

AbhiJuly 12, 2025✓ Verified purchase

These filters were quite similar to the ones installed by Culligan. Quality seems great, it’s easy to install yourself, and the water flow issue was resolved by replacing old filter by this filter brand. Read more

★★★★★

Great replacement filter!

LDTNovember 17, 2025✓ Verified purchase

Exactly what you need! Fits perfectly, high quality filter. Read more

★★★★★

Gets the job done

DIYerMarch 16, 2012✓ Verified purchase

I get municipal drinking water with 1-2ppm of of chlorine (as much as a public pool) and 22 grains of hardness (more than 2x what's considered "extremely hard"). When I had a water softener installed in my house, I also had a Pentek 20" Big Blue Housing installed before softener. I wanted the carbon filter for a few reasons: 1) Keep chlorine out of the shower and bath, out of my family's lungs and off of our skin 2) Keep chlorine out of the washing machine where it bleaches our clothing 3) Protect the resin in the water softener, which should double it's life 4) Protect the plumbing (PEX pipes, rubber in fixtures, etc...) from chlorine 5) Remove the small amount of sediment that is in the city water which collects in valves and fixtures I previously used the Pentek RFC20-BB Radial-Flow Granular Activated Carbon Cartridge . In comparison, this filter is less expensive, has a finer sediment filter (5 micron vs. 25 micron) and it's rated for up to 180F. Also, carbon block filters don't have the same channeling issues as GAC filters, which become less effective at higher flow rates. However, compared to the RFC20-BB this filter can't handle as much water (only 40,000 Gal. vs. 70,000 Gal.) and has a bigger pressure drop (5.5 psi @ 5 gpm vs. 0.9 psi @ 4 gpm). Neither of those were a big concern for me. We use less than 1,000 gal/week so the capacity easily exceeds the 6 month replacement cycle. As for water pressure, I get a solid 60+ psi coming into my house and even a 10 psi drop is not noticeable. If you already have pressure issues, get RFC20 instead. Read more

★★★★☆

Pretty tough on my water pressure

A. WarrenJanuary 26, 2019✓ Verified purchase

I built out my water filter with gauges between each big blue. I don't have any experience with other carbon filters yet, but I can tell you that the pressure dropped from 65 psi on the inlet side to 25 psi on the outlet. You can still take a quality shower at 25 psi, but I will be experimenting with a different carbon filter when I replace this one. I haven't sent off any samples because I receive "safe" water from the water company. Water quality and taste have definitely improved, so I know it's doing its job. I'll update if anything changes or I do any sampling. Read more

★★★★★

Great water filter

Jeremy ViccariSeptember 12, 2025✓ Verified purchase

Our water is tested super clean, this contributes to that goal. Read more

★★★★★

A GOOD FILTER AT A GOOD PRICE

Earl R. OlsenMay 23, 2011✓ Verified purchase

THESE ARE GOOD FILTERS AT A GOOD PRICE. I BOUGHT MINE AT AMAZON.COM FOR ABOUT $20.00 EACH. MY WATER IS CLEAR AND ODOR FREE. WHEN THEY SAY CARBON BLOCK THEY MEAN CARBON BLOCK - THE FILTER IS ONE SOLID PIECE OF CARBON. ONE BORKE IN SHIPMENT. I STILL USED IT. I PUT THE 2 PIECES BACK TOGHETER. WHEN THE FILTER HOUSING SCREWS ON IT TIGHTENED UP ON THE 2 PIECES AND HELD THEN IN PLACE QUITE WELL. [ABOUT 3." BROKE OFF ONE END.] THERE IS A FINE MESH ARROUND THE OUTSIDE WHICH TAKES OUT THE PARTICALE AND MAKES THE CARBON LAST LONGER. THE CARBON TAKES OUT THE TASTE AND ODORS. I HAVE WELL WATER WHICH IS PRETTY CLEAN TO START WITH BUT I WANTED THE ADDED INSURANCE OF THE CARBON FILTER. I HAVE IT IN A WHOLE HOUSE FILTER HOUSING IN THE BASEMENT. I PLAN ON CHANGING IT ONCE A YEAR OR WHEN THE PRESSURE DROP ACROSS THE FILTER INCREASES ABOUT 6 TO 8 PSI. I HAVE A PRESSURE GAGE BEFORE AND AFTER THE FILTER SO I CAN SEE WHEN THE PRESSURE DROP STARTS TO INCREASE. I CHECK THE PRESURE WITH ONE FAUCET [THE KITCHEN FAUCET] WIDE OPEN. Read more

★★★★★

Great product

kevinNovember 16, 2025✓ Verified purchase

My go to filters for my in house water system, run in just before the softener system. Read more

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