GE Smartwater Refrigerator Water Filter - MSWFProduct Description For best filtration results filter cartridge should be replaced every six months or 300 gallons Reduces chlorine taste and odor, lead, mercury, asbestos and other contaminants. For best filtration results filter cartridge should be replaced every six months or 300 gallons. Compatible with select GE side by side and bottom freezer refrigerators. Simple design provides easy, tool free, no mess filter replacement. Filter Model #MSWF