How to Change a Keurig Water Filter

A Keurig water filter helps reduce chlorine taste and odor in the water used to brew coffee. Changing it is a small maintenance task, but the holder and cartridge can differ by machine. Before starting, identify your Keurig model and check its manual or the instructions supplied with the replacement filter. Some Keurig machines do not include a water-filter holder, and not every cartridge fits every holder.

What You’ll Need

A replacement Keurig-compatible water filter cartridge that fits your holder
A clean bowl or cup for soaking and rinsing the cartridge
Access to clean, cool tap water
Your machine’s manual, if you are unsure which holder or filter to use

You usually replace only the small charcoal cartridge, not the plastic holder. If your machine has no holder, check the manual before buying one; a reservoir that accepts a filter accessory may require a separate holder assembly.

Step-by-Step

Check the model and filter type. Look up the model number on the brewer or its documentation. Confirm that the cartridge matches the reservoir’s filter holder. Keurig has used different holder designs, so a cartridge that looks similar may not lock into place correctly.
Turn off and cool the brewer. Switch the machine off and let it cool if it has just brewed. You do not need to unplug it for this routine task, but keep water away from the electrical base and controls.
Remove the water reservoir. Lift the reservoir off the brewer according to your model’s instructions. Pour out any remaining water. If the reservoir is difficult to remove, do not force it; check the manual for the release or lifting direction.
Take out the filter holder. The holder is usually submerged in or attached to the reservoir. Lift it out, then separate its upper and lower sections if the design allows. Note how the pieces fit together so you can reassemble them in the same orientation.
Remove the old cartridge. Pull the used cartridge out of the lower holder. Discard it; it is not meant to be washed and reused. If it sticks, ease it out gently rather than prying with a sharp tool that could damage the holder.
Soak the new cartridge. Follow the cartridge package directions. Many Keurig charcoal cartridges are soaked in clean water for about five minutes to saturate the material and release trapped air. Use the time specified for your particular filter if it differs.
Rinse the cartridge. Hold it under running water and rinse for about 60 seconds, or as directed on the package. This flushes loose charcoal dust from the cartridge. A small amount of dark residue can appear during initial rinsing; keep rinsing until the water runs clear or the package’s instructions say to stop.
Install the cartridge in the holder. Place the rinsed cartridge into the lower section, then reattach the upper section. Make sure it is seated securely and the holder closes as designed. Do not force the pieces together if they do not align; verify that the cartridge and holder are compatible.
Set the replacement reminder, if present. Some holders have a small dial or date marker. Set it for the next change based on the filter instructions or your use. The marker is only a reminder; it does not measure water quality or automatically alert the brewer.
Reinstall the holder and reservoir. Put the holder back in the reservoir in its proper position. Refill the reservoir with fresh water, then seat it securely on the brewer. Check that the holder does not float loose or obstruct the reservoir’s fit.
Run water through the brewer. With no K-Cup pod installed, run a water-only brew or the rinse cycle specified in the manual. This helps clear any remaining charcoal dust from the water path. If the first water looks gray or contains visible particles, run another water-only cycle before brewing coffee.

Common Mistakes

Skipping the soak or rinse: An unprepared charcoal cartridge can release dust or trap air. Follow its preparation directions before installing it.
Using a cartridge that does not fit: Filter shape and holder design vary. Do not trim, stretch, or force a cartridge into place.
Replacing the whole holder unnecessarily: In most cases, the holder is reusable and only the cartridge needs changing. Replace the holder only if it is damaged or the model instructions call for it.
Assuming every Keurig has a filter: Some machines lack a built-in holder or use an optional accessory. Check the machine before ordering replacement parts.
Brewing with loose charcoal still present: Rinse the cartridge and run a water-only cycle. Do not put a pod in until the rinse water is clear.
Waiting for a machine alert: Many models do not track cartridge life. Keep your own reminder instead of assuming the brewer will signal when it is time.

Tips

Many Keurig filter instructions suggest replacing the cartridge about every two months or after roughly 60 reservoir refills, whichever comes first. Treat this as a general guide, not a universal rule: the cartridge packaging and your brewer’s manual take precedence. Heavy use, water characteristics, and the filter design can affect how often replacement is appropriate.

Write the change date on a reminder or use the holder’s dial if it has one. Refill the reservoir with fresh water, and wash the reservoir and removable holder parts as directed in the manual. Do not use soap on a cartridge or attempt to regenerate it by boiling; cartridges are disposable.

A filter is not a substitute for cleaning or descaling the brewer. Descaling addresses mineral buildup inside the machine, while the charcoal filter is intended to improve the taste and odor of reservoir water. Follow the brewer’s separate maintenance instructions for both jobs.

Troubleshooting

The holder will not close: Remove the cartridge and check its orientation, size, and seating. Confirm that you have the right cartridge for that specific holder. Never force the lid or clips.
The holder floats or will not stay in position: Recheck that the upper and lower sections are locked together and that the holder is placed in the correct reservoir slot. If it still will not sit securely, consult the model manual for the correct assembly.
Water looks gray or has black specks: The cartridge may not have been rinsed enough. Remove it and rinse according to the package, reinstall it, and run water-only cycles until the water is clear. If particles continue, stop using the cartridge and check that it is the correct type and undamaged.
Coffee tastes unchanged: The filter reduces certain tastes and odors; it does not remove every flavor or make unsuitable water safe to drink. Confirm the cartridge is fresh and installed correctly. If needed, try the brewer with fresh water and check whether the taste comes from the water, machine, or coffee.
The brewer dispenses slowly or gives an error: A filter change usually does not fix mineral scale or a blocked water path. Remove and reseat the reservoir, then follow the manual’s cleaning or descaling directions. Do not open the brewer’s casing.

Frequently Asked Questions

How often should I change a Keurig water filter?

A common guideline is about every two months or every 60 reservoir refills, whichever comes first. Check your cartridge instructions and brewer manual because recommendations differ by model.

Do all Keurig machines use the same water filter?

No. Some models do not include a filter holder, and holder and cartridge designs can differ. Match the replacement to your model and existing holder.

Do I need to soak and rinse every new cartridge?

Prepare it as its packaging directs. Many charcoal cartridges call for a brief soak and a thorough rinse to remove loose carbon before use.

Can I use my Keurig without a water filter?

Many brewers can operate without the optional filter assembly, but check your model’s manual. Use water suitable for drinking and follow the brewer’s care instructions.

Does changing the filter descale the Keurig?

No. A water filter and descaling serve different purposes. Follow the manual’s separate schedule and procedure for descaling the brewer.

How can I tell whether the new filter is working?

Check that it fits securely and that the rinse water runs clear after preparation. Many brewers do not display filter status, so track replacement dates yourself.

Further reading: Keurig Support. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.