20 x 4.5 Inch Carbon Filters
Standard carbon filters handle chlorine taste and odor. This collection goes further — it's built for households dealing with specific contaminants that basic filtration doesn't adequately address.
If your water comes from a chloraminated municipal supply, contains PFAS compounds (PFOA/PFOS), or you want deeper chemical reduction throughout your whole home, the filters here are the right tool.
What sets this collection apart:
- Chloramine reduction — chloramine is increasingly used by municipalities as a disinfectant, but it's more resistant to standard carbon than chlorine. Catalytic carbon cartridges like the FloPlus Protect and CRFC-20BB are specifically engineered to break it down.
- PFAS/PFOA/PFOS reduction — emerging contaminant filters in this range use advanced media to target per- and polyfluoroalkyl substances, which standard carbon block does not effectively reduce.
- Standard carbon — GAC and carbon block options are also available at the entry level for households primarily concerned with chlorine, taste, and odor.
All cartridges fit standard 20 x 4.5 inch Big Blue housings. Prices range from $34 for standard carbon to $258 for advanced PFAS-rated media — a meaningful investment, but the appropriate one if your water warrants it.
Not sure what's in your water? Call 1-800-277-3458.
