How to Brew Coffee in a CONA Siphon Without a Filter

If you’ve ever tried brewing with a siphon but been put off by the mess of cloth filters or struggled to get clean extractions, you’re not alone. Many coffee enthusiasts look for alternatives that simplify the process without sacrificing clarity or control. One lesser-known option solves this very issue.

You can brew coffee using a CONA siphon pot that includes a built-in water filtration device—no separate filter or cloth required. CONA offers four models, including one with this unique design, and they’re all handcrafted in the UK.

What Makes the CONA Siphon Different?

Most siphon brewers rely on either a cloth filter or a metal filter disk to separate grounds from the brewed coffee. The CONA siphon, however, uses a proprietary water filtration device that eliminates the need for a traditional filter. This design simplifies setup and reduces the chance of clogging or inconsistent flow during brewing.

About the CONA Brand

CONA is a UK-based manufacturer known for crafting high-quality siphon coffee brewers by hand. Unlike mass-produced vacuum pots, each CONA unit is assembled with precision and designed for both functionality and durability. Their attention to detail has made them a favorite among specialty coffee professionals and home enthusiasts alike.

Available CONA Siphon Models

CONA currently produces four different siphon models:

• Model B – 0.28 liters (approximately 280 ml)
• Model C – 0.85 liters (approximately 850 ml)
• Model D – 1.1 liters (approximately 1100 ml)

The price range for these models is approximately 200 to 250 currency units (likely GBP or similar). Among these, one model includes the special filter device that replaces the need for a conventional cloth or mesh filter.

Why Use a Siphon Without a Traditional Filter?

Using a siphon without a typical filter can streamline your brewing routine. Filters—especially cloth ones—require regular cleaning, drying, and replacement to prevent off-flavors. A built-in filtration system means less equipment to manage and often results in a cleaner cup with bright clarity and full flavor body.

How to Brew With a CONA Siphon

While the exact technique may vary slightly depending on the model, brewing with a CONA siphon follows the general principles of vacuum pot brewing:

• Fill the lower chamber with water and apply heat.
• As the water rises into the upper chamber, add your ground coffee (medium-fine grind, similar to table salt).
• Stir the coffee to ensure even saturation.
• Bloom the coffee with a small amount of water, then add the rest in stages.
• Once brewing is complete, remove the heat source. The brewed coffee will descend back into the lower chamber through the built-in filtration mechanism.
• Serve directly from the lower chamber.

Note: The built-in water filter device replaces the need for any additional cloth or paper filter. Ensure proper assembly according to the model’s instructions to maintain optimal brewing pressure and flow.

Frequently Asked Questions

What is a CONA siphon and how is it different from other siphons?

A CONA siphon is a handcrafted vacuum coffee brewer made in the UK. Unlike standard siphons that use cloth or mesh filters, some CONA models include a built-in water filtration device that removes the need for a separate filter. This design simplifies the brewing process and improves consistency.

Which CONA model does not require a traditional filter?

The specific CONA model that features the built-in water filter device is not named in the source, but it is one of the four available models (B, C, D). All CONA siphons are hand-made in the UK and differ in size and capacity.

What sizes do CONA siphons come in?

CONA offers four siphon models: Model B (0.28L), Model C (0.85L), Model D (1.1L), and another unspecified model. Prices range roughly between 200 and 250 units, likely in GBP.

Do I still need to use a cloth or paper filter with a CONA siphon?

No. The specific CONA model mentioned uses a built-in water filtration device that replaces the need for any additional cloth or paper filter, simplifying the setup and cleanup process.

Is the CONA siphon easy to use for beginners?

While siphon brewing has a learning curve, the CONA’s integrated filter system can make the process more straightforward by reducing the number of components. However, users should still follow proper heat control and pouring techniques for best results.

Recommended FrontStreet Beans for Siphon Brewing

For siphon brewing with a CONA, try FrontStreet Coffee’s Ethiopia Humbera — a vibrant Ethiopian single origin with citrus, floral, and stone fruit notes. Alternatively, their Yirgacheffe offers bright acidity with jasmine and berry tones, ideal for highlighting the clarity a siphon provides. For something more balanced, the Classic Blend delivers chocolatey sweetness and nuttiness with a smooth mouthfeel. All three work beautifully in a siphon setup. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.