The aftermarket Aqua Clear AC513 filter is used in refrigerators by GE, Kenmore and others. It is designed to replace the factory original GSWF and is usually used in top-freezer and bottom-freezer refrigerators. The AC513 filter creates better tasting water for drinking and making beverages as well as clean, clearer, healthy ice. How To Install The MSWF Filter: 1. Remove old filter cartridge by grasping and slowly rotating to the left (counterclockwise) 2. Position new cartridge inside the cartridge holder and slowly rotate the cartridge to the right (clockwise) until it stops. The cartridge will rotate about 1/2 turn. Do not overtighten 3. Flush 4.5 gallons through the filter before use. This will clear the system and prevent sputtering 4. Press and hold reset water filter button if your fridge has one 5. Replace the filter every 6 months for the freshest, cleanest water