How to Properly Drain Your Keurig Coffee Maker

Quick answer

• Draining your Keurig is simple. It usually involves removing the water reservoir and letting it drip dry.
• For a full drain, you might need to run a brew cycle with no K-Cup.
• This prevents mineral buildup and keeps your coffee tasting fresh.
• It’s a good habit for long-term machine health.
• Always unplug the machine before any deep cleaning or draining.

What this problem usually is (and is not)

• This isn’t usually a “problem” in the sense of a broken part. It’s more about routine maintenance.
• Draining is about preventing stale water and scale, not fixing a malfunction.
• It’s not about emptying the coffee grounds (that’s separate).
• You don’t need special tools for a basic drain.
• Don’t try to force parts or use excessive water pressure.
• This process is different from descaling, though often done together.

Likely causes (triage list)

Water Reservoir Issues

• Reservoir won’t empty completely: Check for debris blocking the valve at the bottom. You can usually see it if you look closely.
• Water still in the system after draining: This is normal for some models. The internal tubing holds a bit.

Machine Setup Issues

• Not unplugging first: This is a safety hazard, not a draining issue, but crucial. Always disconnect power.
• Incorrectly reassembling parts: If you’ve taken it apart, make sure everything seals properly.

Scale/Cleaning Issues

• Mineral buildup affecting flow: While draining doesn’t remove scale, it can make you notice if scale is already slowing things down. Descaling is the real fix here.

Fix it step-by-step (brew workflow)

1. Unplug the machine.

• What to do: Physically disconnect the power cord from the wall outlet.
• What “good” looks like: The machine is completely inert. No lights, no sounds.
• Common mistake: Forgetting this step. It’s a safety risk.

2. Remove the water reservoir.

• What to do: Gently lift the reservoir straight up and off the base.
• What “good” looks like: The reservoir is free from the machine.
• Common mistake: Trying to twist or pull it at an angle, which can damage the seal.

3. Empty the reservoir.

• What to do: Pour out any remaining water into a sink.
• What “good” looks like: The reservoir is empty.
• Common mistake: Not getting all the water out, leaving some for later.

4. Inspect the reservoir valve.

• What to do: Look at the small valve at the bottom of the reservoir where it connects to the machine. Make sure it’s clear of any debris.
• What “good” looks like: The valve opening is unobstructed.
• Common mistake: Overlooking a small coffee ground or mineral fleck that could clog it.

5. Place the empty reservoir back on the machine.

• What to do: Align the reservoir and press it down firmly until it clicks or sits securely.
• What “good” looks like: The reservoir is seated properly.
• Common mistake: Not pushing it down enough, leading to leaks.

6. Place a mug on the drip tray.

• What to do: Set a medium-sized mug or container under the brew head.
• What “good” looks like: The mug is centered and ready to catch water.
• Common mistake: Using a cup that’s too small and will overflow.

7. Run a brew cycle.

• What to do: Plug the machine back in. Select a medium brew size (e.g., 8 oz). Press the brew button without inserting a K-Cup.
• What “good” looks like: Water flows from the brew head into the mug.
• Common mistake: Accidentally inserting a K-Cup, which will brew coffee instead of just draining water.

8. Discard the hot water.

• What to do: Carefully remove the mug of hot water and pour it out.
• What “good” looks like: The mug is empty. Be careful, it’s hot!
• Common mistake: Not letting it cool slightly before handling.

9. Repeat the brew cycle (optional, for deeper drain).

• What to do: Repeat steps 7 and 8 one or two more times.
• What “good” looks like: Less and less water comes out with each cycle.
• Common mistake: Thinking you need to drain until absolutely zero drops come out. A little residual water in the internal lines is normal.

10. Wipe down the exterior.

• What to do: Use a damp cloth to clean the outside of the machine and the drip tray.
• What “good” looks like: The machine looks clean and tidy.
• Common mistake: Leaving water spots or coffee drips on the exterior.

Prevent it next time

• Clean the reservoir weekly. Wipe it out with soap and water.
• Descale every 3-6 months. This is crucial for machine health and taste.
• Use filtered water. It reduces mineral buildup significantly.
• Don’t leave water in the reservoir long-term. Empty it if you won’t use it for a few days.
• Check the K-Cup area for grounds. Keep it clean after brewing.
• Run a water-only brew cycle occasionally. This flushes the lines.
• Always unplug before deep cleaning. Safety first, always.
• Inspect the drip tray regularly. Empty and clean it to prevent mold.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Not unplugging the machine	Risk of electric shock, especially when touching internal components.	Always unplug before touching internal parts or performing deep cleaning.
Forgetting to remove the K-Cup	Brews a cup of coffee instead of just draining water.	Double-check that the K-Cup holder is empty before starting a drain cycle.
Overfilling the mug during drain cycle	Hot water spills, burns, or makes a mess on the counter.	Use a mug that’s larger than your typical brew size (e.g., 10-12 oz for an 8 oz brew).
Forcing the water reservoir off	Can break the seals or plastic tabs, leading to leaks.	Lift the reservoir straight up gently. Check your manual if it feels stuck.
Not cleaning the reservoir valve	Debris can clog the valve, preventing proper draining or causing leaks.	Inspect and gently wipe the valve at the bottom of the reservoir.
Using tap water without filtering	Rapid mineral buildup (scale) leads to slow brewing, poor taste, and damage.	Use filtered or bottled water. Regular descaling is still necessary, but less frequent.
Skipping descaling	Coffee tastes bitter, brewing is slow, machine can eventually fail.	Follow the descaling instructions in your Keurig manual every 3-6 months.
Leaving stale water in the reservoir	Water can develop an off-taste or even grow mold/bacteria.	Empty and rinse the reservoir if the machine will sit unused for more than a couple of days.
Not wiping down the exterior	Water spots, coffee residue, and potential for mold in the drip tray.	Wipe the machine and drip tray with a damp cloth after use or when draining.
Not running a water-only brew after refill	Can introduce air pockets or push stale water into the fresh batch.	Run a small brew cycle with water only after refilling the reservoir to flush the system.

Decision rules (simple if/then)

• If your Keurig brews slowly, then it’s likely scale buildup, and you need to descale.
• If your coffee tastes off, then check your water quality and the cleanliness of the reservoir.
• If water leaks from the base, then the reservoir might not be seated correctly or the seal is damaged.
• If you see white, chalky deposits, then it’s definitely scale, and descaling is overdue.
• If the machine makes unusual noises, then it could be a pump issue or severe scale buildup; try descaling first.
• If you’re going away for a week or more, then drain the reservoir to prevent stale water.
• If you’re unsure about a specific part, then consult your Keurig’s user manual.
• If the brew button isn’t working, then check if the reservoir is full and properly seated, and ensure the machine is plugged in.
• If you want the absolute best taste, then always use fresh, filtered water and clean your machine regularly.
• If you notice mold in the drip tray, then clean it thoroughly and more often.
• If you’re performing maintenance, then always unplug the machine first for safety.
• If the water doesn’t heat up, then there might be an internal heating element issue; check the manual or contact support.

FAQ

How often should I drain my Keurig?

You don’t need to drain it after every single use. Draining is more for periodic maintenance, like before a deep clean or if you’re storing the machine.

Can I just leave the water in the reservoir?

It’s best not to. Leaving water sitting for extended periods can lead to stale taste or even bacterial growth. Empty it if you won’t use it for a few days.

What if my Keurig still has water in it after I drain it?

Some residual water in the internal tubing is normal. For a more thorough drain, run a few water-only brew cycles.

Is draining the same as descaling?

No. Draining empties the water reservoir and basic lines. Descaling removes mineral buildup (scale) from the internal heating elements and pump.

Do I need to unplug my Keurig to drain it?

Yes, absolutely. Always unplug the machine before performing any maintenance or deep cleaning to avoid electric shock.

Can I use soap to clean the reservoir?

Yes, you can wash the reservoir with mild dish soap and warm water. Rinse it thoroughly afterward.

What kind of water is best for my Keurig?

Filtered water is highly recommended. It significantly reduces mineral buildup and keeps your coffee tasting better.

My Keurig is dripping after I drained it. What’s wrong?

Ensure the reservoir is seated correctly and that the valve at the bottom is clean and not damaged. A faulty seal is the usual culprit.

What this page does NOT cover (and where to go next)

• Detailed troubleshooting for specific error codes. (Check your manual or manufacturer’s website.)
• Repairing internal mechanical failures of the pump or heating element. (Contact customer support.)
• Advanced cleaning techniques beyond basic descaling. (Look for specialized cleaning guides.)
• Modifying your Keurig for custom brews. (This is outside the scope of normal maintenance.)
• Deep dives into the science of coffee extraction. (Explore coffee brewing blogs and forums.)