Whirlpool Whole House Filter Complete Filtration System Item # 31217 Model # WHELJ1 Whirlpool Central Water Filtration System model WHELJ1 features Filtersense™ Technology and allows you to experience the benefits of filtered water throughout your whole home with no maintenance or filters to replace Whirlpool Central Water Filtration System is NSF certified to reduce sediment and chlorine taste and odor Filtersense Technology - this exclusive feature automatically flushes, cleans and drains its internal filter every 14 days which allows the media bed to continually filter sediment, chlorine, and other contaminants throughout the entire home The Central Water Filtration System filters out particles that can build up in your home plumbing and major appliances, helping to maintain household water pressure and increasing the performance and life expectancy of your valuable appliances Many municipalities add chlorine to the water supply which can damage and dry your skin and hair and may give off an unpleasant odor;