The WGB32B-KS whole house filtration system is a "point of entry" filtration system for cleaning up well water. Unlike "point of use" systems (like a reverse osmosis systems) which only filter water for a specific faucet, the WGB32B-KS passes all source water through a three stage filtration process before sending the freshly cleaned water to every part of your home. Each of the three stages of filtration offer a different level of protection. The first stage housing holds a 5-micron polypropylene sediment filter that removes dirt and various larger-sized particles from the water that can clog the following two filters. The second stage of the WGB32B-KS has a GAC+KDF filter designed to remove chlorine, lead, mercury, hydrogen sulfide, heavy metals, pesticides, herbicides, odors, and other contaminants from the water. The third stage of the WGB32B-KS houses a 5-micron CTO coconut shell carbon block filter that knocks out bad tastes and odors, removes up to 99% of chlorine from the water, and is highly effective on pesticides, herbicides, and industrial chemicals. The WGB32B-KS is ideal for removing common contaminants and heavy metals found in the majority of well water. If you are on municipal (city) water or another generally clean water supply, the WGB32B may be a better fit for you.