Dupont Filters:
WFPTC100 - 1 cartridge
Certified NSF/ANSI Standard 42: Aesthetic Chlorine Taste and Odor and Particulates
Certified NSF/ANSI Standard 53: Cadmium, Lead, Mercury and VOCs
Certified NSF/ANSI Standard 372: Low Lead Content and Compliance
WFPTC102 - 2 cartridges
Certified NSF/ANSI Standard 42: Aesthetic Chlorine Taste and Odor and Particulates
Certified NSF/ANSI Standard 53: Cadmium, Lead, Mercury and VOCs
Certified NSF/ANSI Standard 372: Low Lead Content and Compliance
WFPTC103 - 3 cartridges
Certified NSF/ANSI Standard 42: Aesthetic Chlorine Taste and Odor and Particulates
Certified NSF/ANSI Standard 53: Cadmium, Lead, Mercury and VOCs
Certified NSF/ANSI Standard 372: Low Lead Content and Compliance
WFPTC053 - 3 cartridges (doesn't filter Cadmium, Lead, Mercury and VOCs)
Certified NSF/ANSI Standard 42: Aesthetic Chlorine Taste and Odor and Particulates
Certified NSF/ANSI Standard 372: Low Lead Content and Compliance