3M Aqua-Pure Under Sink Water Filtration System &ndash; Model AP-DWS1000 Reduces chlorine taste and odor for more appealing drinking water Reduces particulate and rust to help preserve plumbing and fixtures Reduces lead, VOCs, MTBE, and parasitic protozoan cysts for peace of mind Automatic shutoff meter reminds user to change cartridges Sanitary twist-off cartridge design to help provide fast and easy cartridge change