Aquasana EQ-300-WELL Whole House 3-Year 300000-Gallon Well Water Filter with UV Ultraviolet Aquasana Rhino exceeds NSF standards by removing 97% of chlorine for up to 300,000 gallons Does not require salt or back flushing Includes pre-filter, copper-zinc, carbon, post-filter, ultraviolet (UV) and standard fittings Filtering your water improves indoor air quality by reducing chemicals that vaporize in shower steam Great tasting, healthy water throughout your home