Aries (AF-20-3690-BB) 20"x4.5" Big Blue Activated Alumina Filter
Aries AF-20-3690-BB 20"x4.5" Big Blue Activated Alumina Filter
The Aries AF-20-3690-BB uses high-grade activated alumina media to reduce fluoride, arsenic (V), selenium, and other contaminants from municipal and well water supplies. Designed for 20"x4.5" Big Blue housings, this filter delivers professional-grade performance for whole-house and commercial installations where specialty contaminant removal is required.
What makes activated alumina effective
Fluoride reduction
Activated alumina removes fluoride through adsorption, making it ideal for areas with high municipal fluoride levels or well water with naturally occurring fluoride.
Arsenic V removal
Effectively reduces arsenic (V) from water supplies, providing an additional layer of protection for households concerned with heavy metal contamination.
Big Blue compatibility
Standard 20"x4.5" dimensions fit all major 20-inch Big Blue filter housings, making replacement and retrofitting straightforward.
Whole-house capacity
Large media volume supports flow rates suitable for whole-house filtration, not just point-of-use applications.
Specialty media
Activated alumina requires specific pH and contact time for optimal performance. Best used in dedicated specialty filter stages.
Long service life
High-capacity media extends replacement intervals compared to smaller cartridges, reducing maintenance frequency and cost per gallon.
Fits standard 20-inch Big Blue systems
The Aries AF-20-3690-BB is designed for use in any standard 20-inch Big Blue housing with 4.5-inch inner diameter, including brands like Pentek, Culligan, and generic Big Blue systems. Common applications include whole-house fluoride reduction systems, well water treatment for arsenic removal, and specialty filtration stages in multi-stage water treatment setups. Works best when water pH is between 5.5 and 8.5 for optimal fluoride adsorption. Not recommended as a standalone sediment or carbon replacement—this is a specialty filter for targeted contaminant removal.
Aries Filter Works manufactures specialty filtration media for professionals and informed homeowners who need more than basic sediment and carbon filtration.
Original: $265.00
-65%$265.00
$92.75Product Information
Product Information
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Description
Aries AF-20-3690-BB 20"x4.5" Big Blue Activated Alumina Filter
The Aries AF-20-3690-BB uses high-grade activated alumina media to reduce fluoride, arsenic (V), selenium, and other contaminants from municipal and well water supplies. Designed for 20"x4.5" Big Blue housings, this filter delivers professional-grade performance for whole-house and commercial installations where specialty contaminant removal is required.
What makes activated alumina effective
Fluoride reduction
Activated alumina removes fluoride through adsorption, making it ideal for areas with high municipal fluoride levels or well water with naturally occurring fluoride.
Arsenic V removal
Effectively reduces arsenic (V) from water supplies, providing an additional layer of protection for households concerned with heavy metal contamination.
Big Blue compatibility
Standard 20"x4.5" dimensions fit all major 20-inch Big Blue filter housings, making replacement and retrofitting straightforward.
Whole-house capacity
Large media volume supports flow rates suitable for whole-house filtration, not just point-of-use applications.
Specialty media
Activated alumina requires specific pH and contact time for optimal performance. Best used in dedicated specialty filter stages.
Long service life
High-capacity media extends replacement intervals compared to smaller cartridges, reducing maintenance frequency and cost per gallon.
Fits standard 20-inch Big Blue systems
The Aries AF-20-3690-BB is designed for use in any standard 20-inch Big Blue housing with 4.5-inch inner diameter, including brands like Pentek, Culligan, and generic Big Blue systems. Common applications include whole-house fluoride reduction systems, well water treatment for arsenic removal, and specialty filtration stages in multi-stage water treatment setups. Works best when water pH is between 5.5 and 8.5 for optimal fluoride adsorption. Not recommended as a standalone sediment or carbon replacement—this is a specialty filter for targeted contaminant removal.
Aries Filter Works manufactures specialty filtration media for professionals and informed homeowners who need more than basic sediment and carbon filtration.
