
Aries (AF-20-4000) 20"x2.5" Big Blue Mixed Bed Deionization (DI) 2 Filter
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 |
How to Install the AF-20-4000 DI Filter
- Shut off water supply and relieve system pressure by opening a downstream faucet.
- Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
- Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
- Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
- Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
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.
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 |
How to Install the AF-20-4000 DI Filter
- Shut off water supply and relieve system pressure by opening a downstream faucet.
- Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
- Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
- Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
- Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
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.
Original: $92.28
-65%$92.28
$32.30Description
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 |
How to Install the AF-20-4000 DI Filter
- Shut off water supply and relieve system pressure by opening a downstream faucet.
- Unscrew the Big Blue filter housing sump using a housing wrench and remove the old filter cartridge.
- Inspect and clean the housing interior and O-ring, applying food-grade silicone lubricant to the O-ring if needed.
- Insert the Aries AF-20-4000 DI cartridge into the housing, ensuring it seats properly on the center post.
- Thread the sump back onto the housing cap hand-tight, then flush the system for 3-5 minutes before use.
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.













