This product is made in the USA.

when it says "reduces . . . chlorine taste" does this mean it removes chlorine from water or just alters it in some way that you don't taste it?

No carbon will remove the chlorine may not be 100% but you will definitely tell a difference if chlorine is all your dealing with then no need for a 5mic carbon go just carbon it's cheaper if you ever decide you want a water softener it's best to remove the chlorine first... But a great 1x20 filter

Does it fit inside 10filter housing

I assume you are asking if this cartridge fits in the shorter "big blue" filter housing ... While its actually closer to 13"×7" they refer to it by average filter size which is 10"×4.5". That's a really good question since nowhere does it state which housing to use with it. Dimensions shown for this cartridge are 4.6"×4.6"×9.8". Dimensions for the Big Blue® housing are approx 7.25"×7.25"×13" and calling for a filter approximately 4.5"×10". This is the housing and filter combination that I use. The cartridge fits snugly and allows proper water flow in that housing.

Our municipal water in San Francisco is pretty clean, how long before this filter cartridge is recommended for replacement?

This cartridge is rated for 6,000 gallons. If kitchen sink only, should provide drinking water for a year. If whole house, run 2 in parralel to get needed flow, the pair might last 3 months.

Pentair Pentek Ep 20bb Big Blue Carbon Water Filter 20

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Description

💧 Elevate your whole house water game with crystal-clear confidence!

UNIVERSAL 20 INCH FIT - Seamlessly replaces any 20" x 4.5" carbon filter cartridge in heavy-duty housings.
CERTIFIED PEACE OF MIND - NSF International tested & certified for trusted, safe water filtration.
MAXIMIZED FILTER LONGEVITY - High porosity design prevents clogging, squeezing every drop of performance.
MASSIVE 44 000 GALLON CAPACITY - Year-long filtration power—replace only when water pressure or quality dips.
UNMATCHED CHLORINE ODOR DEFENSE - Superior carbon block tech slashes chlorine taste & smell for fresher water.

The Pentair Pentek EP-20BB is a 20-inch whole house carbon block water filter cartridge featuring bonded powdered activated carbon for superior chlorine and odor reduction. Designed with a high porosity structure to prevent clogging, it fits all standard 20" Big Blue housings and offers an impressive 44,000-gallon filtration capacity. NSF certified, this cartridge ensures reliable, long-lasting performance for residential and commercial water filtration needs.

Specifications

ASIN	B00310Y9KI
Best Sellers Rank	#12,283 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #91 in Replacement Under-Sink Water Filters
Brand	Pentek
Brand Name	Pentek
Customer Reviews	4.7 out of 5 stars 1,057 Reviews
EU Spare Part Availability Duration	1 Years
External Testing Certification	NSF, ANSI
Global Trade Identification Number	00051678583432
Item Dimensions D x W x H	4.63"D x 4.63"W x 20"H
Item Type Name	Everpure Full Flow Drinking Water System
Item Weight	5.7 Pounds
Manufacturer	Pentair Industries
Manufacturer Part Number	155583-43
Material	Extruded Carbon Block
Material Type	Extruded Carbon Block
Model Number	EP-20BB
Number of Items	1
Product Benefits	Reduces Chlorine, Removes Odor
Product Dimensions	4.63"D x 4.63"W x 20"H
Set Name	Whole House Water Filter Set
UPC	851905131050 700999877941 798527517490 132017513058 163121152147 163120790494 806294984510 115971047135 851905125257 851905125202 182682388031 809390003468 115971035729 051678583432 808112760696 807032972783
Unit Count	1 Count

Reviews

R**F

27.01.2026

D**R

16.03.2012

A**I

12.07.2025

L**T

17.11.2025

A**N

26.01.2019

J**I

12.09.2025

E**N

23.05.2011

V**T

13.09.2012

L**N

18.11.2024

J**T

6.11.2020

W**P

8.02.2025

C**Y

28.12.2024

R**A

20.05.2025

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Pentair Pentek EP-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Carbon Block Replacement Cartridge with Bonded Powdered Activated Carbon (PAC) Filter, 20" x 4.5", 5

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