The round GE classic: the Refresh R-9991 replaces the MWF SmartWater cartridge trusted across GE side-by-side and bottom-freezer fridges. COMPATIBILITY - REPLACES: GE MWF, MWFP, MWFA, GWF, MWFAP and Kenmore 46-9991, 469991, 9991. Match the number printed on your current filter before ordering - the cartridge number, not the fridge brand, confirms the fit. CERTIFIED FILTRATION: Independently certified to NSF/ANSI 42, the activated carbon block reduces chlorine taste, odor and aesthetic impurities while preserving the beneficial minerals your body wants - calcium, magnesium, potassium and sodium. The BPA-safe housing keeps every drop clean, and the high-flow core holds steady water pressure and fast ice production. BEFORE FIRST USE: Install until the cartridge seats fully, then flush 3-4 gallons of water to clear loose carbon fines. A cloudy or gray first glass is completely normal for a new carbon filter and clears quickly - it is not a defect. LIFESPAN: Replace every 6 months, sooner if flow slows or taste changes - water quality varies by municipality. Keep a spare on hand so your family never waits on fresh, filtered water. THE REFRESH PROMISE: Original-quality filtration for up to 50% less than name-brand cartridges, backed by responsive US-based support and a satisfaction guarantee. If it does not fit or perform, we make it right.