Filtrex
KX Technologies - FXB20CL2 - 20" x 4.5" Filtrex Ecocarb GreenBlock CL2 - 10 Micron - Carbon Block Chlorine Filter
$120.06
The KX Technologies FXB20CL2 Filtrex Ecocarb GreenBlock delivers NSF-certified chlorine, taste, and odor reduction using high-performance coconut shell carbon in a 20" x 4.5" format built for whole-house and commercial applications. This 10 micron carbon block filter handles up to 7 gpm with exceptional dirt holding capacity and a 34,000 gallon service life, all while reducing greenhouse gas emissions through KX's patented greencarbon manufacturing process.
SPECIFICATIONS
FXB20CL2 Technical Details
| Model Number | FXB20CL2 |
| Dimensions | 20" x 4.5" (Big Blue) |
| Filtration Rating | 10 Micron Carbon Block |
| Flow Rate | 7 gpm (6.0 psi drop) |
| Capacity | 34,000 gallons @ 7 gpm |
| Media Type | NSF 61 Coconut Shell Greencarbon PAC |
| Contaminant Removal | Chlorine, Taste, Odor, VOCs, Sediment |
| Certifications | NSF 42, NSF 53, WQA |
INSTALLATION & USE
Replacing Your GreenBlock Filter
- Shut off water supply and relieve system pressure by opening a downstream faucet
- Unscrew the Big Blue housing using a filter wrench, remove the old cartridge, and clean the housing and o-ring
- Insert the FXB20CL2 cartridge vertically into the housing, ensuring it seats properly on the center post
- Apply food-grade lubricant to the o-ring, reassemble the housing, and tighten hand-tight plus a quarter turn with the wrench
- Turn on water slowly, check for leaks, and flush the filter for 3-5 minutes before use
COMPATIBILITY
System Requirements
The FXB20CL2 fits all standard 20" x 4.5" Big Blue filter housings with a 1" or 1.5" NPT port configuration. This filter is designed for whole-house chlorinated municipal water systems, commercial applications, and well water installations where chlorine taste and odor removal is required alongside sediment filtration. The GreenBlock's coconut shell carbon offers higher micropore density than coal-based alternatives, making it particularly effective for chlorine and VOC reduction in high-flow residential and light commercial settings.
🔧 Pro Tip: Coconut shell carbon blocks like the FXB20CL2 perform best when inlet water temperature stays below 100°F. If you're installing on a hot water line or in a location with high ambient temperatures, consider adding a pre-filter sediment stage to extend the GreenBlock's working life and maintain consistent chlorine reduction throughout its 34,000 gallon capacity.
