water filtration and enhancement apparatus and installation; water filters for drinking water, bathing water, and water in residential buildings and installation of the same; water filtering units for domestic, commercial, industrial, outdoor, remove, and wilderness use; water filtration and purification units and replacement cartridges and filters therefor; water purification and filtration apparatus; water sterilizers; water treatment equipment, namely, cartridge filtration units; filters for removing sediment, iron, sulfur, tastes and odors from water, and for clarification of water supplies, and parts thereof; apparatus, and parts thereof for chemically treating water supply systems generally and for supplying chemicals to water supply systems; antimicrobial water purification units, water filter cartridges, water purification units for domestic use, and household appliances, namely, water filters for domestic use and water dispensers