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"

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

⚙️20-inch Big Blue housing fit

🛡️NSF/ANSI 42 certified

€ 209.46

Duties & taxes included

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your hydration game with every drop—because your home deserves premium purity.

LONG LASTING PERFORMANCE - Up to 25,000 gallons capacity—replace only every 6 months to keep water tasting fresh.
END TO END CARBON CONTACT - Water flows through the entire granular carbon bed for maximum contaminant adsorption.
CERTIFIED QUALITY ASSURANCE - NSF/ANSI 42 certification guarantees trusted filtration performance and safety.
PURE TASTE ZERO COMPROMISE - Eliminates chlorine taste & odor for crisp, refreshing water throughout your home.
UNIVERSAL BIG BLUE COMPATIBILITY - Fits all standard 20" Big Blue housings for seamless, heavy-duty replacement.

The Pentair Pentek GAC-20BB is a heavy-duty 20-inch granular activated carbon water filter cartridge designed to reduce chlorine taste and odor, improving water quality throughout your home. Certified to NSF/ANSI 42 standards, it fits all 20-inch Big Blue housings and offers up to 25,000 gallons of filtration capacity, ensuring long-lasting, reliable performance with minimal maintenance.

Specifications

ASIN	B0014C067K
Best Sellers Rank	#8,648 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 (1,318)
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 Count

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