New Open Box 3M Aqua Pure AP904 AP917HD-S Whole House Water Change Replacement Filter. Box Opened Prior To Asses Condition. DESIGNED FOR USE WITH 3M Aqua-Pure Whole House Sanitary Quick Change Water Filter System AP904. EASY TO REPLACE: Sanitary Quick Change (SQC) design allows for fast and easy change-outs of this filter without having to contact the filter media or the need for a filter wrench. CLEARLY GREAT WATER: This whole house water filter reduces sediment, chlorine taste and odor as well as scale – helping to increase the life of hot water heaters and appliances dishwashers, clothes washers, etc. NSF STANDARD 42 CERTIFIED: Certified to reduce sediment by one of the world’s most respected independent certification organizations that helps protect the world’s food, water, consumer product and environment.