Watts (MAXETW-FF20) 20"x4.5" C-MAX Carbon Block Chlorine Reduction 5 Micron Filter
MAXETW-FF20 20"x4.5" C-MAX Carbon Block Filter
High-capacity carbon block filtration for chlorine, taste, and odor reduction in whole house and commercial applications. 5 micron nominal rating removes sediment while maintaining flow.
Engineered for demanding chlorine reduction
Solid Carbon Block
Made from bituminous carbon with no release of carbon fines. Superior contact time compared to granular media for consistent chlorine reduction throughout the rated lifespan.
Dual-Action Filtration
5 micron nominal rating captures sediment while the carbon matrix adsorbs chlorine, taste, and odor compounds. One filter handles both mechanical and chemical contaminants.
High Adsorptive Capacity
Extended carbon block design provides 20,000 gallon service life in typical municipal water. Verified through independent laboratory testing to meet performance claims.
Big Blue Standard
20" x 4.5" dimensions fit all standard Big Blue housings. Drop-in replacement for existing systems without modification or adapters.
Fits standard 20" Big Blue housings
The Watts MAXETW-FF20 installs in any housing designed for 20 inch x 4.5 inch cartridges. Compatible with whole house systems, commercial filtration setups, and well water applications using Big Blue style filter housings. Common housing models include those designed for high-flow municipal or well water filtration.
Replacement schedule
Municipal Water
Replace annually for typical city water use or when you notice reduced flow or chlorine taste returning. 20,000 gallon rated capacity.
Well Water
Replace more frequently if used on well water with higher sediment loads. Monitor pressure differential across filter housing.
Commercial Use
High-volume applications require more frequent replacement. Track gallons processed or install a pressure gauge to monitor filter loading.
Lab Verified
Performance tested and certified by independent laboratories
Bituminous Carbon
High-quality carbon source for superior adsorption efficiency
No Carbon Release
Solid block construction prevents carbon fines in your water
Cost Effective
Competitive pricing versus GAC filters with better performance
MAXETW-FF20 20"x4.5" C-MAX Carbon Block Filter
High-capacity carbon block filtration for chlorine, taste, and odor reduction in whole house and commercial applications. 5 micron nominal rating removes sediment while maintaining flow.
Engineered for demanding chlorine reduction
Solid Carbon Block
Made from bituminous carbon with no release of carbon fines. Superior contact time compared to granular media for consistent chlorine reduction throughout the rated lifespan.
Dual-Action Filtration
5 micron nominal rating captures sediment while the carbon matrix adsorbs chlorine, taste, and odor compounds. One filter handles both mechanical and chemical contaminants.
High Adsorptive Capacity
Extended carbon block design provides 20,000 gallon service life in typical municipal water. Verified through independent laboratory testing to meet performance claims.
Big Blue Standard
20" x 4.5" dimensions fit all standard Big Blue housings. Drop-in replacement for existing systems without modification or adapters.
Fits standard 20" Big Blue housings
The Watts MAXETW-FF20 installs in any housing designed for 20 inch x 4.5 inch cartridges. Compatible with whole house systems, commercial filtration setups, and well water applications using Big Blue style filter housings. Common housing models include those designed for high-flow municipal or well water filtration.
Replacement schedule
Municipal Water
Replace annually for typical city water use or when you notice reduced flow or chlorine taste returning. 20,000 gallon rated capacity.
Well Water
Replace more frequently if used on well water with higher sediment loads. Monitor pressure differential across filter housing.
Commercial Use
High-volume applications require more frequent replacement. Track gallons processed or install a pressure gauge to monitor filter loading.
Lab Verified
Performance tested and certified by independent laboratories
Bituminous Carbon
High-quality carbon source for superior adsorption efficiency
No Carbon Release
Solid block construction prevents carbon fines in your water
Cost Effective
Competitive pricing versus GAC filters with better performance
Original: $196.73
-65%$196.73
$68.86Description
MAXETW-FF20 20"x4.5" C-MAX Carbon Block Filter
High-capacity carbon block filtration for chlorine, taste, and odor reduction in whole house and commercial applications. 5 micron nominal rating removes sediment while maintaining flow.
Engineered for demanding chlorine reduction
Solid Carbon Block
Made from bituminous carbon with no release of carbon fines. Superior contact time compared to granular media for consistent chlorine reduction throughout the rated lifespan.
Dual-Action Filtration
5 micron nominal rating captures sediment while the carbon matrix adsorbs chlorine, taste, and odor compounds. One filter handles both mechanical and chemical contaminants.
High Adsorptive Capacity
Extended carbon block design provides 20,000 gallon service life in typical municipal water. Verified through independent laboratory testing to meet performance claims.
Big Blue Standard
20" x 4.5" dimensions fit all standard Big Blue housings. Drop-in replacement for existing systems without modification or adapters.
Fits standard 20" Big Blue housings
The Watts MAXETW-FF20 installs in any housing designed for 20 inch x 4.5 inch cartridges. Compatible with whole house systems, commercial filtration setups, and well water applications using Big Blue style filter housings. Common housing models include those designed for high-flow municipal or well water filtration.
Replacement schedule
Municipal Water
Replace annually for typical city water use or when you notice reduced flow or chlorine taste returning. 20,000 gallon rated capacity.
Well Water
Replace more frequently if used on well water with higher sediment loads. Monitor pressure differential across filter housing.
Commercial Use
High-volume applications require more frequent replacement. Track gallons processed or install a pressure gauge to monitor filter loading.
Lab Verified
Performance tested and certified by independent laboratories
Bituminous Carbon
High-quality carbon source for superior adsorption efficiency
No Carbon Release
Solid block construction prevents carbon fines in your water
Cost Effective
Competitive pricing versus GAC filters with better performance
