How to Replace Your Refrigerator Water Filter

Replacing a refrigerator water filter is one of those tasks that seems more complicated than it actually is, mostly because you're standing in front of an appliance that cost more than your first car. The stakes feel high. They aren't. Your filter is either a cartridge that spins out by hand, a slide-in cartridge that pops from a housing, or—rarely—a pitcher-style filter you remove from inside the fridge itself. The location, design, and replacement interval all depend on your model, but the principle is always the same: identify what you have, buy the matching replacement, and swap the old one for the new one. Done right, you'll have clean drinking water again and no puddles on your kitchen floor. Done wrong, you'll have puddles. This guide takes you through the right way.

1. Find Your Filter Fast. Open your refrigerator and look for the water filter. On most modern fridges, it's in the upper right corner of the fridge compartment, or in the grille at the bottom front. Some older models keep the filter inside a cabinet below the fridge. The filter will be housed in one of three ways: a cylindrical cartridge sticking out perpendicular to the fridge wall (twist-out style), a cartridge inside a plastic housing that sits in a slot (slide-out style), or occasionally a pitcher that sits on a shelf. Take a photo of the filter location and the fridge's model number—you'll need it to buy the right replacement.
2. Shut Off Water First. Locate the water supply line that feeds your refrigerator—it's usually under the sink, connected to the cold water line with a shutoff valve. Turn that valve clockwise until it stops. Don't force it; it only needs to be snug. If you cannot find the shutoff valve or it doesn't work, turn off the main water supply to your house instead. This step prevents water from spraying when you disconnect the filter.
3. Release Line Pressure. Go to your refrigerator and push the water dispenser button with a glass under it. Hold it for a few seconds to release the pressure in the line. You may get a trickle or nothing at all, depending on how much water was in the line. This prevents a spray when you remove the old filter.
4. Unscrew Old Filter Out. If your filter is a cylindrical cartridge sticking out from the fridge wall, position a small cup or dish under it to catch any drips. Grip the filter firmly and rotate it counterclockwise (the same direction you'd loosen a jar lid) until it comes free. Don't pull straight out while turning—let the rotation do the work. The filter will release after about three-quarters of a turn. Once it's loose, pull it straight out and set it in the cup. There may be a small amount of water in the housing.
5. Slide Out Cartridge. If your filter sits in a plastic housing with a button or release clip, position a small cup under the housing to catch drips. Locate the release button or clip on the housing—it's usually a small plastic button on the front or side. Press it firmly and hold while you slide the cartridge out of the slot toward you. The cartridge should come out smoothly without resistance. If it's stuck, release the button, wiggle gently side to side, then try again. Once it's out, note the rubber seals or O-rings on the cartridge—they come with the replacement, so don't panic if they fall off.
6. Clear Housing Debris. With the old filter out, take a moment to look at the empty housing. You should see either an empty cylinder, an empty slot, or a plastic cavity. If there's visible debris, mineral buildup, or sediment, wipe it out with a clean, damp cloth. Don't use any chemicals or cleaners. If the housing is very dirty, you can run your finger along the interior walls to feel for buildup, then wipe with the cloth again. Check that any rubber seals inside the housing are still in place and haven't come out with the old filter.
7. Unpack Replacement. Unpack the replacement filter—it's the same type you just removed. Before you install it, you may need to remove a protective plastic cap or seal. Some filters have a rubber gasket or O-ring pre-installed; if yours didn't come with one and the old filter had one, make sure the new filter has one too, or install the old one on the new cartridge. Do not install the filter yet. Just have it ready in your hand.
8. Twist New Filter In. Hold the new filter with the threaded end (the end that will go into the housing) pointing toward the opening in the fridge wall. Align the filter straight with the housing and push it in gently until the rubber gasket at the tip makes contact with the seal in the housing. You should feel slight resistance. Now rotate the filter clockwise (the same direction you'd tighten a jar lid) until it stops. Don't force it past the stop point—it should be firm and snug, but not wrenched tight. The rotation locks the filter and creates a watertight seal.
9. Slide Filter Home. Hold the new filter horizontally with the rubber seals or O-rings facing the direction they came from the old filter. Align the cartridge with the slot in the housing, making sure any notches or grooves on the cartridge line up with the housing guides. Slide the filter in smoothly toward the fridge wall until you feel it seat fully. The housing should close around the cartridge. If it doesn't slide all the way in, stop and check alignment—don't force it. Once seated, you should hear or feel a soft click as the filter locks into place.
10. Restore Water Pressure. Go to the shutoff valve under your sink and turn it counterclockwise to open the water supply. Turn slowly and you'll feel it open. There's no need to crank it all the way—it only needs to be fully open, which is usually less than one full rotation. Listen for the water line to pressurize and check for any leaks under the sink. If water is dripping from under the sink, turn the valve back off and check the connection where the supply line enters the shutoff valve.
11. Clear Manufacturing Residue. Go back to your refrigerator and run water from the dispenser into a glass or pitcher for 30 to 60 seconds. Do not drink this water yet. You're flushing out any loose carbon dust or manufacturing residue from the new filter. The water may be slightly cloudy or dark at first—this is normal and expected. Keep flushing until the water runs clear. Then discard the first gallon or so of water. Your filter is now ready for drinking water.
12. Trash Old Filter. The old filter can go in your regular trash. Some people recycle their filters through mail-back programs run by filter manufacturers or retailers, but this is optional. If you want to do this, check the packaging of your new filter for a prepaid return label or visit the manufacturer's website. Otherwise, wrapping the old filter in newspaper and throwing it away is perfectly fine.