How To Empty A Bunn Coffee Maker

Learning how to empty a Bunn coffee maker is the essential first step before any cleaning or descaling process. Emptying a Bunn coffee maker correctly ensures you can maintain your machine properly and avoid any potential issues.

This guide provides clear, step-by-step instructions for different Bunn models. We will cover everything from the basic daily process to handling a full reservoir.

The core process for emptying your Bunn brewer is straightforward, but safety and precision are key. The main components you’ll deal with are the water reservoir, the brew funnel, and the carafe. Always start by unplugging the machine from the electrical outlet to ensure complete safety.

Never attempt to pour out water from the reservoir while the unit is plugged in. This prevents any risk of electrical shock. Let’s break down the standard procedure that applies to most home and commercial Bunn models.

Standard Step-By-Step Emptying Procedure

Follow these steps to safely remove water from your coffee maker’s internal tank.

Unplug the coffee maker from the wall outlet.
Remove the brew funnel (or basket) from the machine. Empty any used coffee grounds into your compost or trash.
Take the carafe off the warming plate. Pour out any remaining coffee.
Locate the reservoir lid, usually on the top of the unit. Open it.
Place a large bowl or another carafe on the warming plate, directly under the brew head where water dispenses.
Find the manual flush switch or button. This is often a small lever or switch located on the front, side, or behind the funnel area. On some models, it’s a button labeled “Manual” or “Flush.”
Press and hold the manual flush switch. Water will begin to flow from the brew head into your container.
Continue holding the switch until the water reservoir is completely empty and water stops flowing. This may take a minute or two.
Once empty, release the switch. You can now safely wipe the inside of the reservoir with a clean cloth if desired.

This method uses the machine’s own pump to drain the water, which is the method recommended by Bunn. It is much safer and more effective than trying to tip the unit.

Emptying The Bunn Coffee Maker For Cleaning

When you need to clean or descale your brewer, a thorough empty is crucial. You want to start with a completely empty system so the cleaning solution isn’t diluted.

After following the standard emptying procedure above, there’s one more step. Some water always remains in the hot water tank lines. To clear this, perform a quick rinse cycle with fresh water.

Ensure the reservoir is empty from the previous flush.
Fill the reservoir with fresh, cold water up to the minimum fill line.
Place an empty bowl or carafe under the brew head.
Press and hold the manual flush switch again to run this clean water through the system.
Drain this water completely. Your system is now ready for a cleaning solution.

Important Precautions Before Cleaning

Always check your owner’s manual for model-specific instructions. Never use vinegar in a Bunn coffee maker, as it can damage the internal seals and tanks. Use a commercial descaling solution formulated for coffee makers or the Bunn-branded cleaner.

How To Empty A Bunn Velocity Brew Coffee Maker

Bunn Velocity Brew models, like the VB or BT series, have a slightly different setup. They often feature a large, open reservoir at the back. The emptying principle is similar but the steps vary a bit.

Unplug the unit from power.
Remove the brew basket and carafe, emptying both.
Look for the manual flush switch. On many Velocity Brew models, it is a small black or red lever located behind where the brew basket sits.
Place a large container under the brew head.
Hold the lever in the “open” or “manual” position. Water will begin to drain.
Hold the lever until water stops flowing. You may need to tilt the unit slightly forward to help the last bit of water drain from the reservoir at the back.

For these models, it’s also a good idea to check for a drain plug on the back of the reservoir, though most rely on the manual flush method.

Emptying A Bunn Commercial Coffee Maker

Commercial Bunn brewers, like the G series or pourover models, are built for durability. The process is fundamentally the same but on a larger scale.

The key difference is the location of the manual flush valve. It is often a more robust lever or knob. Always refer to the specific commercial manual, but the general steps are consistent: unplug, remove accessories, engage the manual drain valve with a container in place, and allow the tank to fully empty. Commercial units may have a dedicated drain hose you can direct into a floor sink.

Why Properly Emptying Your Brewer Matters

You might wonder why a special procedure is needed instead of just unplugging and tipping. There are several important reasons that affect your coffee’s taste and the machine’s lifespan.

Prevents Stale Water Buildup

Water left sitting in a warm tank can become stale and develop off-flavors. These flavors can transfer to your coffee, making it taste flat or odd. Starting with a fresh, empty tank before brewing ensures the cleanest taste.

Essential For Effective Descaling

Descaling solutions work best at full strength. If the reservoir and lines are half-full of old water, the descaler becomes diluted and less effective at removing mineral deposits. A complete empty is the first step to a thorough descale.

Protects The Internal Heating System

Bunn coffee makers use a specialized thermofoil heating system to heat water quickly. Mineral scale buildup on these components insulates them, making the heater work harder. This can lead to premature failure. Regular emptying as part of cleaning prevents rapid scale accumulation.

Avoids Mineral Deposits In The Reservoir

In areas with hard water, minerals can settle at the bottom of the reservoir if water is constantly left in it. Over time, this creates a crusty layer that is difficult to remove. Draining the tank regularly helps prevent this.

Common Mistakes To Avoid

Even with simple instructions, a few common errors can cause problems. Being aware of these will help you maintain your Bunn brewer for years.

Tipping The Machine: Never tip or shake your Bunn to empty it. This can disturb sediment and force it into the internal lines, potentially causing clogs. It can also damage internal components not meant to be jostled.
Forgetting To Unplug: Always, always unplug first. This is non-negotiable for safety when dealing with water and electrical appliances.
Using The Wrong Container: Use a container large enough to hold all the water from the reservoir. The standard home reservoir holds about a half-gallon to a gallon. Overflowing the container creates a mess and risks water damage.
Not Holding The Flush Switch Long Enough: Water may stop, then start again as air moves through the lines. Hold the switch until you are certain no more water is dripping out, even intermittently.
Skipping The Rinse After Emptying For Cleaning: If you empty to add cleaner, forgetting to do a fresh water rinse first dilutes the cleaning solution and reduces its effectiveness.

What To Do After Emptying Your Bunn Coffee Maker

Once the machine is empty, you have a perfect opportunity for basic maintenance. Here’s what you can do.

Wipe Down The Reservoir

With the tank empty, use a soft, damp cloth to wipe the inside of the reservoir. This removes any light mineral film or coffee splashes. Do not use abrasive scrubbers or harsh chemicals.

Clean The Brew Funnel And Carafe

Wash the brew funnel (basket) and carafe with warm, soapy water. For stained carafes, a mixture of baking soda and water can help. Rinse all parts thoroughly to avoid soap residue in your next brew.

Check The Spray Head

Look up at the spray head (where the hot water comes out). If you see any mineral deposits or coffee grounds, wipe it gently with a damp cloth. For clogs, you can use a straightened paper clip to clear the small holes carefully.

Let Components Air Dry

Before reassembling and using the machine, let all parts air dry completely. This prevents musty odors from developing in damp, enclosed spaces.

Frequently Asked Questions

How Often Should I Empty My Bunn Coffee Maker?

For daily use, it’s good practice to empty and refill the reservoir with fresh water if the machine will be off for more than a few hours. For cleaning, empty it before each descaling session, which should be done every 3-6 months depending on your water hardness.

Can I Use The Manual Flush Switch Every Day?

Yes, the manual flush switch is designed for this purpose. Using it daily to empty old water is perfectly safe and can improve your coffee’s taste by ensuring you always start with fresh water.

My Bunn Won’t Drain With The Manual Switch, What Should I Do?

First, ensure you are holding the switch correctly and long enough. If it still doesn’t work, the switch mechanism might be stuck or the lines could be clogged with scale. Try consulting your manual for switch location details. If problems persist, it may need service.

Is It Necessary To Empty The Machine Before Storing It?

Absolutely. If you plan to store your Bunn coffee maker for any length of time, you must empty it completely using the manual flush method. This prevents mold growth, mineral settling, and damage from freezing if stored in a cold place.

What’s The Difference Between Emptying And Descaling?

Emptying is simply removing the water from the system. Descaling is a chemical process that dissolves hard mineral deposits (limescale) that build up inside the heating tank and water lines. You must empty the brewer before you begin the descaling procedure.

Following the correct method for how to empty a Bunn coffee maker is a simple yet vital skill for any owner. It protects your investment, ensures your coffee tastes its best, and makes routine cleaning tasks much easier. By taking a few minutes to do this properly, you’ll extend the life of your reliable Bunn brewer for countless more pots of coffee.