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Aries (AF-20-4000) 20"x2.5" Big Blue Mixed Bed Deionization (DI) 2 Filter

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Aries (AF-20-4000) 20"x2.5" Big Blue Mixed Bed Deionization (DI) 2 Filter

The Aries AF-20-4000 is a 20-inch mixed bed deionization filter that removes dissolved ionic impurities to deliver ultra-pure water for laboratory, pharmaceutical, and industrial applications. This DI cartridge fits standard Big Blue 20"x4.5" housings and reduces total dissolved solids (TDS) to near-zero levels for critical water quality needs.
SPECIFICATIONS

Aries AF-20-4000 Technical Details

Model Number AF-20-4000
Dimensions 20" x 4.5" (Big Blue)
Manufacturer Aries Filter Works
Filter Media Mixed bed deionization resin
Application TDS reduction, final polish for ultra-pure water
Housing Compatibility Standard 20" x 4.5" Big Blue housings
Primary Use Laboratory, pharmaceutical, industrial processes
Performance Removes ionic contaminants, reduces TDS to near-zero
INSTALLATION & USE

How to Install the AF-20-4000 DI Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet.
  2. Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
  3. Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
  4. Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
  5. Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
COMPATIBILITY

Housing Requirements

The Aries AF-20-4000 mixed bed DI filter is designed for standard 20-inch Big Blue housings with 4.5-inch diameters. This cartridge works best as a final polishing stage after reverse osmosis or other pre-filtration to maximize resin life. It is compatible with whole-house and point-of-use systems requiring ultra-pure water output. Mixed bed DI filters are commonly used in laboratory settings, medical equipment, aquariums, automotive detailing, and industrial processes where mineral-free water is essential.

🔧 Pro tip: Install a TDS meter after your DI filter to monitor resin exhaustion. When TDS readings begin to rise above 5 ppm, it's time to replace the cartridge to maintain water purity.
The Aries AF-20-4000 is a 20-inch mixed bed deionization filter that removes dissolved ionic impurities to deliver ultra-pure water for laboratory, pharmaceutical, and industrial applications. This DI cartridge fits standard Big Blue 20"x4.5" housings and reduces total dissolved solids (TDS) to near-zero levels for critical water quality needs.
SPECIFICATIONS

Aries AF-20-4000 Technical Details

Model Number AF-20-4000
Dimensions 20" x 4.5" (Big Blue)
Manufacturer Aries Filter Works
Filter Media Mixed bed deionization resin
Application TDS reduction, final polish for ultra-pure water
Housing Compatibility Standard 20" x 4.5" Big Blue housings
Primary Use Laboratory, pharmaceutical, industrial processes
Performance Removes ionic contaminants, reduces TDS to near-zero
INSTALLATION & USE

How to Install the AF-20-4000 DI Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet.
  2. Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
  3. Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
  4. Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
  5. Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
COMPATIBILITY

Housing Requirements

The Aries AF-20-4000 mixed bed DI filter is designed for standard 20-inch Big Blue housings with 4.5-inch diameters. This cartridge works best as a final polishing stage after reverse osmosis or other pre-filtration to maximize resin life. It is compatible with whole-house and point-of-use systems requiring ultra-pure water output. Mixed bed DI filters are commonly used in laboratory settings, medical equipment, aquariums, automotive detailing, and industrial processes where mineral-free water is essential.

🔧 Pro tip: Install a TDS meter after your DI filter to monitor resin exhaustion. When TDS readings begin to rise above 5 ppm, it's time to replace the cartridge to maintain water purity.
$32.30

Original: $92.28

-65%
Aries (AF-20-4000) 20"x2.5" Big Blue Mixed Bed Deionization (DI) 2 Filter

$92.28

$32.30

Description

The Aries AF-20-4000 is a 20-inch mixed bed deionization filter that removes dissolved ionic impurities to deliver ultra-pure water for laboratory, pharmaceutical, and industrial applications. This DI cartridge fits standard Big Blue 20"x4.5" housings and reduces total dissolved solids (TDS) to near-zero levels for critical water quality needs.
SPECIFICATIONS

Aries AF-20-4000 Technical Details

Model Number AF-20-4000
Dimensions 20" x 4.5" (Big Blue)
Manufacturer Aries Filter Works
Filter Media Mixed bed deionization resin
Application TDS reduction, final polish for ultra-pure water
Housing Compatibility Standard 20" x 4.5" Big Blue housings
Primary Use Laboratory, pharmaceutical, industrial processes
Performance Removes ionic contaminants, reduces TDS to near-zero
INSTALLATION & USE

How to Install the AF-20-4000 DI Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet.
  2. Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
  3. Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
  4. Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
  5. Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
COMPATIBILITY

Housing Requirements

The Aries AF-20-4000 mixed bed DI filter is designed for standard 20-inch Big Blue housings with 4.5-inch diameters. This cartridge works best as a final polishing stage after reverse osmosis or other pre-filtration to maximize resin life. It is compatible with whole-house and point-of-use systems requiring ultra-pure water output. Mixed bed DI filters are commonly used in laboratory settings, medical equipment, aquariums, automotive detailing, and industrial processes where mineral-free water is essential.

🔧 Pro tip: Install a TDS meter after your DI filter to monitor resin exhaustion. When TDS readings begin to rise above 5 ppm, it's time to replace the cartridge to maintain water purity.
Aries (AF-20-4000) 20"x2.5" Big Blue Mixed Bed Deionization (DI) 2 Filter | Isopure Water