GE SmartWater Inline Filter System (GXRLQ) Filter should be replaced at most every six months for best filtration results (Replacement Filter: FQK1K) Compatible with refrigerators without built-in filtration: Easily attaches directly to existing refrigerator/icemaker water line Premium filtration: Certified to reduce asbestos, chlorine-resistant cysts, lead and 5 other contaminants Inline filtration: Filtered ice for your beverages