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The Neo-Pure CTO1-4520 Carbon Block Filter for advanced filtration is manufactured using coconut shell carbon for improved reduction of chlorine taste and odor. The CTO1-4520 filter is ideal for use as a reverse osmosis prefilter or postfilter, and all materials are FDA compliant so they are an excellent choice for many residential, food service and commercial drinking water applications. Specifications: Certifications: FDA compliant and made with NSF/ANSI 42 approved materials. Reduces: Chlorine taste & odor Applications: Residential, food service, and commercial drinking water Filter Media: Coconut Shell Carbon (No Phosphate) Micron Rating: 5 micron Made in the USA Efficient filter cartridge with high adsorptive capacity Low Pressure Drop Eco-Friendly Where to Find Chloraminated Water: Please visit the EPA's Fed Reporting Services page to see if chloraminated water is in your area.
The catalog often lists the same model at several merchants — worth a price check before you buy.
| Filter Media | Coconut shell carbon |
| Micron Rating | 5 micron |
| Dimensions | 20 in x 4.5 in |
| Certifications | FDA compliant, NSF/ANSI 42 approved |
| Phosphate-Free | Yes |
| Origin | USA |







