SimPure 5-Micron CTO Filter Cartridges – 20x4.5-Inch, 2-Pack (DB20P/FC25B)

Premium whole-house filtration with SimPure CTO activated carbon cartridges

Meet the SimPure 5-Micron CTO filter cartridges, crafted for standard 20" x 4.5" housings. Made from a premium coconut shell carbon block and wrapped in food-grade fabric layers, these cartridges are designed to target typical contaminants larger than five microns while maintaining material safety verified by independent testing to NSF/ANSI 42 standards.

In real-world use, the cartridge is designed to reduce residual chlorine and related off-notes, helping to curb odors and tastes that can color drinking water. The result is a water profile that often feels cleaner when drawn for drinking, cooking, or hot water. This is about enhancing everyday water quality rather than promising specific outcomes.

• Real 98% filtration efficiency for chlorine-related tastes and odors
• Removes sulfur smell and other common off-notes, with less color in water
• Premium materials: coconut shell carbon block wrapped with food-grade fabric

Performance you can plan around

Designed for high flow and extended service life, this 20-inch cartridge supports up to 15 GPM, making it suitable for whole-house filtration needs. It can process up to 20,000 gallons before replacement, helping you manage maintenance and downstream appliance protection. For best results, consider replacement every 3–6 months, depending on water quality and usage.

• High flow rate up to 15 GPM for whole-house use
• Up to 20,000 gallons of filtration before replacement
• Recommended replacement every 3–6 months as needed

Universal fit, versatile applications

The 4.5x20 cartridge is compatible with most standard 20" x 4.5" housings, including SimPure DB20, DB20P, and other popular models. Rubber end washers help ensure a tight seal, supporting reliable performance across various setups — from well water and city water to homes, offices, farms, and small restaurants. This cartridge is positioned as a practical replacement option for common filtration stages, such as after sediment filters or before downstream appliances, without asserting guaranteed results.

Note: This description paraphrases the product features to help you compare options. Actual results will depend on your specific water conditions and system configuration.