Aries (AF-20-3690) 20"x2.5" Activated Alumina Filter
Aries AF-20-3690 Activated Alumina Filter
Specialty fluoride reduction filter using Resintech SIR-900 activated alumina media for well water and whole-house applications requiring pH-sensitive contaminant removal
Activated Alumina Chemistry
Resintech SIR-900 Media
High-capacity activated alumina specifically engineered for fluoride adsorption through surface ion exchange at optimal pH ranges
pH Sensitive Performance
Maximum efficiency at pH 5.5 where fluoride exists in ideal ionic form for alumina binding. Performance degrades outside narrow pH window
Flow Rate Critical
Rated at 0.5 gpm to ensure sufficient contact time between water and media. Higher flow rates reduce capacity and breakthrough occurs earlier
Standard Housing Fit
Fits all 20-inch Big Blue housings with 2.5-inch diameter. Compatible with Pentek, Hydronix, and Culligan standard formats
Housing Requirements
The AF-20-3690 fits any standard 20-inch Big Blue housing with 2.5-inch inner diameter. Compatible with Pentek #20 housings, Hydronix HF series, Culligan HD-950, and generic 20"×4.5" sump housings using standard cartridges. Requires low flow rate application or dedicated fluoride filtration point with flow restrictor to achieve 0.5 gpm contact time.
Replacement Schedule
Capacity-Based Replacement
Replace when rated capacity is reached. Actual lifespan depends heavily on influent fluoride concentration and pH stability
Time-Based Maximum
Replace every 6 months even if capacity not reached to prevent media channeling and biological growth in low-use systems
Performance Testing
Monitor fluoride levels with test strips. Replace when effluent fluoride rises above acceptable threshold indicating breakthrough
FDA Compliant Materials
All components meet FDA standards for drinking water contact
Domestic Manufacturing
Manufactured in the USA with quality-controlled assembly and media sourcing
Specialty Application
Purpose-built for fluoride reduction in controlled pH environments
Big Blue Standard
Industry-standard 20×2.5 format for universal housing compatibility
Aries AF-20-3690 Activated Alumina Filter
Specialty fluoride reduction filter using Resintech SIR-900 activated alumina media for well water and whole-house applications requiring pH-sensitive contaminant removal
Activated Alumina Chemistry
Resintech SIR-900 Media
High-capacity activated alumina specifically engineered for fluoride adsorption through surface ion exchange at optimal pH ranges
pH Sensitive Performance
Maximum efficiency at pH 5.5 where fluoride exists in ideal ionic form for alumina binding. Performance degrades outside narrow pH window
Flow Rate Critical
Rated at 0.5 gpm to ensure sufficient contact time between water and media. Higher flow rates reduce capacity and breakthrough occurs earlier
Standard Housing Fit
Fits all 20-inch Big Blue housings with 2.5-inch diameter. Compatible with Pentek, Hydronix, and Culligan standard formats
Housing Requirements
The AF-20-3690 fits any standard 20-inch Big Blue housing with 2.5-inch inner diameter. Compatible with Pentek #20 housings, Hydronix HF series, Culligan HD-950, and generic 20"×4.5" sump housings using standard cartridges. Requires low flow rate application or dedicated fluoride filtration point with flow restrictor to achieve 0.5 gpm contact time.
Replacement Schedule
Capacity-Based Replacement
Replace when rated capacity is reached. Actual lifespan depends heavily on influent fluoride concentration and pH stability
Time-Based Maximum
Replace every 6 months even if capacity not reached to prevent media channeling and biological growth in low-use systems
Performance Testing
Monitor fluoride levels with test strips. Replace when effluent fluoride rises above acceptable threshold indicating breakthrough
FDA Compliant Materials
All components meet FDA standards for drinking water contact
Domestic Manufacturing
Manufactured in the USA with quality-controlled assembly and media sourcing
Specialty Application
Purpose-built for fluoride reduction in controlled pH environments
Big Blue Standard
Industry-standard 20×2.5 format for universal housing compatibility
Original: $153.77
-65%$153.77
$53.82Description
Aries AF-20-3690 Activated Alumina Filter
Specialty fluoride reduction filter using Resintech SIR-900 activated alumina media for well water and whole-house applications requiring pH-sensitive contaminant removal
Activated Alumina Chemistry
Resintech SIR-900 Media
High-capacity activated alumina specifically engineered for fluoride adsorption through surface ion exchange at optimal pH ranges
pH Sensitive Performance
Maximum efficiency at pH 5.5 where fluoride exists in ideal ionic form for alumina binding. Performance degrades outside narrow pH window
Flow Rate Critical
Rated at 0.5 gpm to ensure sufficient contact time between water and media. Higher flow rates reduce capacity and breakthrough occurs earlier
Standard Housing Fit
Fits all 20-inch Big Blue housings with 2.5-inch diameter. Compatible with Pentek, Hydronix, and Culligan standard formats
Housing Requirements
The AF-20-3690 fits any standard 20-inch Big Blue housing with 2.5-inch inner diameter. Compatible with Pentek #20 housings, Hydronix HF series, Culligan HD-950, and generic 20"×4.5" sump housings using standard cartridges. Requires low flow rate application or dedicated fluoride filtration point with flow restrictor to achieve 0.5 gpm contact time.
Replacement Schedule
Capacity-Based Replacement
Replace when rated capacity is reached. Actual lifespan depends heavily on influent fluoride concentration and pH stability
Time-Based Maximum
Replace every 6 months even if capacity not reached to prevent media channeling and biological growth in low-use systems
Performance Testing
Monitor fluoride levels with test strips. Replace when effluent fluoride rises above acceptable threshold indicating breakthrough
FDA Compliant Materials
All components meet FDA standards for drinking water contact
Domestic Manufacturing
Manufactured in the USA with quality-controlled assembly and media sourcing
Specialty Application
Purpose-built for fluoride reduction in controlled pH environments
Big Blue Standard
Industry-standard 20×2.5 format for universal housing compatibility
