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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💦 Elevate Your Hydration Game!

PEACE OF MIND - NSF certified for your safety and confidence.
ENHANCED FILTRATION - Post-filter reduces carbon fines and particles.
TRANSFORM YOUR WATER - Say goodbye to bad taste and odors!
UNIVERSAL COMPATIBILITY - Fits all 20" Pentair Big Blue systems.
LONG LASTING PERFORMANCE - Enjoy up to 25,000 gallons of purified water.

The PentekPentair GAC-20BB Big Blue Carbon Water Filter is a heavy-duty granular activated carbon replacement cartridge designed for whole house filtration. Measuring 20" x 4.5", it effectively reduces bad taste and odors, ensuring high-quality drinking water. With a capacity of 25,000 gallons, this filter fits all compatible 20" housings and is NSF certified for safety.

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KSh23243

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Brand	Pentek
Model Number	155249-43
Color	Blue
Diameter	4.5 Inches
Capacity	25000 Gallons
Material	Pleated Carbon-Impregnated
Compatible Models	155249-43, GAC20-BB, GAC-20BB
Item Weight	2.27 Kilograms

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

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