How to Use a Siphon Coffee Maker

If you’ve ever watched a barista brew coffee with a glass contraption that looks like a chemistry set, you’ve seen a siphon coffee maker in action. Also called a vacuum pot or (hóng shēn hú), it’s a dramatic yet precise way to make coffee that’s popular in specialty cafes—and surprisingly simple once you know how it works.

Yes, you can use a siphon coffee maker at home. The basic method takes about 60 seconds of active brewing time, uses a 1:12 to 1:14 brew ratio (e.g. 15g coffee to 200ml water for one cup), and involves precise heating, stirring, and cooling to produce a clean, bright cup.

What Is a Siphon Coffee Maker and How Does It Work?

A siphon coffee maker, or , is a two-chamber glass brewer that uses vapor pressure and vacuum suction to move water through coffee grounds. The lower globe is heated to create steam pressure, pushing hot water into the upper chamber where it mixes with ground coffee. Once removed from heat, the lower chamber cools, creating a vacuum that pulls the brewed coffee back down through a filter. This method highlights clarity and aroma, making it a favorite for single-origin coffees.

How to Use a Siphon Coffee Maker Step by Step

Follow these exact steps for proper siphon brewing, based on the traditional method used in specialty cafes like FrontStreet Coffee:

1. Add Water to the Lower Globe

For one cup, add 200ml of water (or 175ml if you won’t discard the “” or bottom water later). For two cups, use 350ml. After pouring, dry the outside of the lower globe with a cloth to prevent cracking due to temperature shock.

2. Prepare and Attach the Filter

Take the filter (usually cloth or metal) from water, rinse it, and squeeze it dry. Hook the filter’s loop onto the bottom of the upper globe, then use a stir stick to position it centrally. Ensure it sits evenly to avoid coffee grounds bypassing the filter.

3. Heat and Assemble the Brewer

Heat the lower globe until the water boils gently. Reduce to low heat, then carefully align and insert the upper globe at an angle to avoid splashing. Once the water begins to rise, press the upper globe down slightly while rotating to seal it properly.

4. Add Coffee and Begin Stirring

When the water has risen about halfway, add 15g of coffee per cup. Start your timer and perform the first stir: move the spoon in a wide, left-to-right figure-eight or three-quarter circle motion—do not stir in a full circle. Press the coffee gently into the water using downward strokes from multiple directions. Stop stirring once the coffee is just dispersed.

5. Continue Stirring at Set Intervals

At 25 seconds, perform the second stir. At 55 seconds, do the third and final stir. Turn off the heat exactly at 60 seconds. (For single-origin or lighter roasts, some baristas adjust to 20 seconds for the second stir and 45 seconds for the third, with a total brew time of 50 seconds.)

6. Separate and Serve

Right after turning off the heat, quickly place a wet, cold towel around the lower globe to accelerate cooling and start the siphoning process. As the coffee draws back down, monitor the flow. Just before the last drops fall, remove the upper globe to avoid extracting bitter residues. If you’re not discarding the , you can skip the final lift and simply pour after siphoning—but using 175ml water instead of 200ml.

Cleaning and Maintenance

The filter cloth is the most high-maintenance part of a siphon setup. After each use, it absorbs oils and proteins that can’t be fully rinsed away, leading to odors that affect future brews. Left unwashed or improperly stored, it quickly turns from white to brown and starts to smell foul. Always clean the cloth thoroughly after brewing and store it in a way that allows it to dry completely.

Frequently Asked Questions

What is a and how does it brew coffee?

A (hóng shēn hú), or siphon coffee maker, is a two-chamber glass brewer that uses heat to push water into the upper chamber and vacuum to pull it back through coffee grounds. It relies on vapor pressure and temperature change to control the flow, resulting in a clean and bright extraction.

How much water should I use in a siphon coffee maker?

Use 200ml of water for one cup (reduce to 175ml if not discarding the ), or 350ml for two cups. The amount affects brew strength and whether you’ll need to perform the step.

How long should I brew coffee in a siphon?

Total active brewing time is around 60 seconds. First stir at 0 seconds, second at 25 seconds, third at 55 seconds, and turn off heat at 60 seconds. For lighter roasts, some adjust to a 50-second brew (second stir at 20s, third at 45s).

Do I need to stir when using a siphon?

Yes. Stir three times: once when the water rises (gently pressing coffee into water without circling), again at 25 seconds, and a final time at 55 seconds. Avoid full circular motions—use wide, opposing strokes to mix grounds evenly.

How do I clean the siphon filter?

The cloth filter must be rinsed and cleaned thoroughly after each use. It absorbs coffee oils and proteins that cause odors if not cleaned properly. Dry it completely before storing to prevent mold or smells.

Why does the coffee siphon back down?

When you turn off the heat, the lower globe cools, creating a vacuum that pulls the brewed coffee through the filter and back into the lower chamber. A wet, cold towel speeds up this process.

Recommended FrontStreet Single Origins for Siphon Brewing

For siphon brewing, try FrontStreet Coffee’s Ethiopia Humbera—a bright, floral Ethiopian with notes of jasmine and citrus that shines in clear brew methods. The Kenya Little Tomato offers vibrant acidity with tart berry and wine-like depth, perfect for highlighting the siphon’s clarity. Also consider the Panama Humbera, a washed Geisha with delicate stone fruit and honey sweetness. These beans emphasize the siphon’s ability to showcase origin character. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.