How come 1 is 50 dollars and a 2 pack is 200 dollars ?

I haven't purchased this item lately, the $200 2 pack may be a for 2 2 packs.

Will it fit a culligan installed filter housing - a bb gac 20 ??

The one I received was for a cullingan big blue filter collapsed blocking flow and putting a lot of charcoal granules through out system. I have used these filters for years with little problem ,it may have been a fluke

What does bb mean? is it different from the gac-20?

BB means that it is designed to fit our Big Blue housings which hold a 4 inch diameter cartridge rather than the standard 2.4 or 2.5 inch diameter cartridges. If you have additional questions, please reach out to our technical support team (USA based) at 800-279-9404.

How do you know when to change this filter?

Vincent, If this is a residential application this filter should be replaced approx. every 6 months - 1 year. Never past 1 year. If you smell or taste chlorine or have an odor in your water the filter should be replaced. Let us know if this helps. Thanks, Paul.

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

Product ID: 3678874

Details

External Testing Certification
NSF ANSI
Item Weight
5 Pounds
Material
Pleated
Product Benefits
Reduces
Product Dimensions
4.57"D x x

💧25,000 gallon capacity

🧪NSF certified for safety

🛠️Fits all 20" Big Blue housings

R3719

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your hydration game with the Big Blue standard in water filtration!

CERTIFIED PEACE OF MIND - NSF International tested and certified—trust your water quality like a pro.
PURE TASTE ZERO COMPROMISE - Effectively eliminates chlorine taste & odors for crisp, clean water.
BUILT TO LAST BUILT FOR YOU - Heavy-duty granular activated carbon ensures up to 25,000 gallons of premium filtration.
ADVANCED POST FILTER PROTECTION - Reduces carbon fines and suspended particles for crystal-clear water every time.
UNIVERSAL FIT ULTIMATE CONVENIENCE - Compatible with all 20" Pentair Big Blue and heavy-duty housings—easy swap, no hassle.

The Pentair Pentek GAC-20BB is a 20-inch heavy-duty granular activated carbon water filter cartridge designed to fit all standard 20" Big Blue housings. It effectively reduces chlorine taste and odors, delivering up to 25,000 gallons of clean, great-tasting water. NSF certified and equipped with a post-filter to minimize carbon fines, this cartridge ensures reliable, professional-grade filtration for your home or office.

Specifications

ASIN	B0014C067K
Best Sellers Rank	#6,995 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #56 in Replacement Under-Sink Water Filters
Brand Name	Pentek
Customer Reviews	4.6 4.6 out of 5 stars (1,295)
External Testing Certification	NSF, ANSI
Global Trade Identification Number	00051678249437
Included Components	filter
Item Dimensions D x W x H	4.57"D x 19.58"W x 4.57"H
Item Type Name	Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20" x 4.5"
Item Weight	5 Pounds
Manufacturer	Pentair Industries
Manufacturer Part Number	155249-43
Material Type	Pleated Carbon-Impregnated
Model Number	GAC-20BB
Number of Items	1
Product Benefits	Reduces Chlorine
Set Name	Pentek GAC-20BB Set
UPC	851905124281 051678249437
Unit Count	1.0 Count

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