The 3M™ CUNO® legacy drop-in style replacement Cartridge, model CFS117-S, when used in a drop-in style filtration housing, provides consistent quality water by reducing chlorine taste and odor through granular activated carbon. The built-in scale inhibitor helps to reduce potential harmful effects of scale build-up on equipment. Our 3M™ CUNO® legacy drop-in style replacement Cartridge, model CFS117-S (PDF, 939.54 Kb), when used in a drop-in style filtration housing, is an economical way to reduce chlorine taste and odor in water through granular activated carbon. The built-in scale inhibitor helps to reduce the potential harmful effects of scale build-up on your equipment. This replacement cartridge is a great choice for anyone looking for an inexpensive chlorine taste and odor and scale reduction filter. 3M™ water filtration products systems and cartridges offer a wide range of solutions designed to address many types of water quality concerns. Third party certifications, such as NSF and WQA are an advantage provided on many 3M™ water filtration Products. 3M™ purification is a known leader in filtration technology recognized for innovation, trust and quality around the world.