Filtrete High Performance Whole House Filter Large Capacity. Replacement filter for Filtrete High Performance Whole House Sanitary Quick-Change Filter System 4WH-QCTO-S01. Reduces chlorine taste and odor sand soil silt rust and sediment based on 3M Testing. 1/4 turn change for easy filter replacement without the need for a wrench. Sanitary design allows filter change without touching the dirty media or without having to clean the housings with soap between filter changes. 12-month new filter life for 4+ persons / +3-bathroom households. Space saving design. Certified to NSF Standards 42 and 372 - Use only genuine Filtrete/OEM replacement filters certified for use with Filtrete systems.