Keurig Water Filter Replacement Guide (K-Supreme, K-Elite, K-Express)

What Keurig's Guides Say About the Water Filter

Keurig treats its water filter as optional. The Use & Care Guides say: "If you have a Keurig Water Filter, install it now. Refer to your Water Filter Starter Kit for instructions." The fitting steps are in the kit's own leaflet, not the brewer's guide. The brewer guides give the rest. Change it every 2 months (the K-Express and K-Iced Essentials maintenance schedules). Take it out before descaling or cleaning the reservoir. And on the K-Supreme SMART, set the Water Filter Reminder in Settings.

Why fit one? Keurig recommends a Keurig Water Filter, or bottled or filtered water, if your coffee tastes of chlorine or minerals. It says a filter helps "remove water impurities and improve beverage taste". It never suggests distilled water: "Do not use distilled water."

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Before You Start

• Check you have a Keurig Water Filter and its Starter Kit leaflet. That leaflet holds the fitting steps.
• Know your model. The K-Supreme SMART has a reminder setting; most others don't.
• Plan around descaling. If you're about to descale, take the filter out first.

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Tools and Parts

⚠️ Safety: "Always be sure to turn off and unplug your brewer before cleaning." Don't put the reservoir in the dishwasher. The K-Express and K-Iced Essentials guides say their parts are "not dishwasher safe".

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Step 1: Take the Reservoir Off

1. Turn the brewer off and unplug it.
2. Remove the reservoir lid, then lift the reservoir straight up off the base.
3. Empty it.

Time: 1 minute
Difficulty: Easy

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Step 2: Remove the Old Filter

1. Take the old filter out of the reservoir.
2. While it's out, clean the reservoir. Wipe the inside and the underside of the lid with a damp, non-abrasive, lint-free cloth. Don't dry the inside with a cloth, as lint may remain. Let it air-dry.

Time: 5 minutes
Difficulty: Easy

The K-Elite guide adds: "If you are using a water filter inside the water reservoir, remove it before cleaning."

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Step 3: Fit the New Filter as the Kit Shows

Fit the new filter following the Water Filter Starter Kit instructions. The brewer guides refer you there and don't repeat the steps.

1. Prepare and fit the filter exactly as the kit's leaflet shows.
2. Refill the reservoir with fresh water to the MAX line.
3. Set the reservoir back on its base, seated properly.

Time: As the kit describes
Difficulty: Easy

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Step 4: Set the Reminder (K-Supreme SMART)

1. With the brewer on, press both arrows at the same time to open Settings.
2. Use the right arrow to reach Water Filter Reminder.
3. Set it so the brewer reminds you when it's time to change the filter.

Time: 1 minute
Difficulty: Easy

Other models print no filter reminder in their guides. Note the date, and change the filter every 2 months.

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Test the Filter

Run a cleansing brew (no pod, a large mug) and check the water flows normally. If the brewer won't brew, the reservoir may not be seated, or the water may be below the minimum line. Add 2 oz more and try again.

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The Filter and Descaling Are Separate Jobs

A water filter doesn't replace descaling. The same guides that mention the filter still ask you to descale every 3 months, or when the descale notification appears. Keurig says descaling "helps maintain the heating element and other internal parts that come in contact with water". Take the filter out first, run the full descale and rinse, then put the filter back. Full steps: Keurig descale light guide.

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Model Notes

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When It's a Keurig Problem

• The brewer won't brew with the reservoir seated and filled above the minimum, filter in or out. The guide says to contact Customer Service if the Add Water warning persists.
• The reservoir leaks or won't sit level on its base

Keurig Customer Service: 1-866-901-BREW (2739). Limited one-year warranty.

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Keep the Water Good

• Change the filter every 2 months.
• Remove it before descaling, and put it back after the rinse.
• Change the water in the reservoir regularly, and empty it before storing the brewer.
• No distilled water.

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FAQ

How often should I change a Keurig water filter?

Every 2 months, according to the K-Express and K-Iced Essentials maintenance schedules. The K-Supreme SMART can remind you through Settings → Water Filter Reminder.

Do I need a water filter in my Keurig?

No, it's optional. The guides say "If you have a Keurig Water Filter, install it." Keurig recommends a filter, or bottled or filtered water, if your coffee tastes of chlorine or minerals.

Should I take the filter out before descaling?

Yes. The K-Supreme SMART guide says to remove the water filter from the reservoir before descaling, and the K-Elite says to remove it before descaling and before cleaning.

Does the filter mean I can skip descaling?

No. The guides still ask you to descale every 3 months or when the notification appears, filter or not. Remove the filter before you start.

Can I use distilled water with the filter?

No. Keurig's guides say not to use distilled water. Use fresh tap, filtered or bottled water.

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Related Keurig Guides

• Keurig Water Reservoir Problems
• Keurig Descale Light Won't Turn Off?
• Keurig Add Water Light Won't Turn Off?
• Keurig Water Pump Problems

Sources: Keurig Use & Care Guides for the K-Supreme, K-Supreme SMART, K-Elite, K-Express and K-Iced Essentials.