Medium-fine, close to the texture of table salt, is the grind setting siphon coffee needs. That texture sits between a pour-over grind and an espresso grind, and it decides whether the vacuum drawdown finishes cleanly or stalls halfway through.
Siphon brewing, also called vacuum pot brewing, pulls hot water up into an upper chamber where it steeps with the grounds. Grind size controls how fast that coffee filters back down once you take the heat away.
Grind dial numbers are not standardized across grinder brands, so a setting of 14 does not mean the same thing on every machine. What matters is matching the texture and watching how the drawdown behaves, not chasing one universal number.
The Right Grind Setting for Siphon Coffee
James Hoffmann, in The World Atlas of Coffee and his brewing notes for Square Mile Coffee Roasters, describes siphon coffee as needing a grind slightly finer than a V60 pour-over grind, but coarser than espresso. He also notes that if the grind is too fine, the coffee bed can form a tight seal against the filter, and the drawdown stalls instead of pulling through cleanly.
As a texture check, the grounds should feel like fine table salt. That is finer than typical drip coffee grounds and noticeably coarser than powdery espresso grounds.
You can compare this against grind guidance for drip brewing grind settings or the finer end used in espresso grind size guidance if you want a side by side sense of scale. If you want a deeper technical reference, The World Atlas of Coffee book covers manual brew methods in detail.
Get the medium-fine texture right first, then dial in your specific grinder’s exact number for consistent results every brew.
Setting It on a Burr Grinder
On a Baratza Encore or Virtuoso, siphon coffee brews well from setting 14 to setting 16, out of the grinder’s 1 to 40 range, based on Baratza’s own grind settings guidance. That range falls around 550 to 700 microns, which Baratza classifies as medium-fine.
Key Specifications (Baratza Encore):
- Burr type: conical
- Setting range: 1 to 40
- Siphon range: 14 to 16
- Approximate micron range: 550 to 700 microns
A Baratza Encore grinder gives you a repeatable starting point. If you use a different grinder, don’t copy that number directly.
Match the texture description instead, then fine-tune from there by taste and drawdown speed.
Does the Filter Type Change the Grind?
Siphon brewers use cloth, paper, or metal filtration, and the filter affects how forgiving it is of a finer grind. Cloth filters, the traditional choice on Hario’s glass siphon brewers, hold back fine particles well and tolerate a finer grind without much sediment in the cup.
Metal mesh filters let more fine particles pass through than cloth or paper filters do. That means a slightly coarser grind helps keep the coffee from turning gritty in the bottom chamber.
Whichever filter you use, start medium-fine and adjust toward coarser only if you actually see grit or sediment in the finished cup.
How Long Should the Brew Take
Hario’s official brewing instructions for the Syphon Technica and Sommelier models call for 15 grams of coffee per 240 milliliters of water, ground medium-fine. Hario recommends letting the coffee steep for 40 to 60 seconds after the water rises into the upper chamber, then removing the heat so the vacuum can pull the coffee back down.
A Hario Syphon coffee maker and a small digital coffee scale make that ratio easy to hit consistently.
Once the heat comes off, the drawdown should happen fairly quickly. A grind that’s too fine slows that stage down and can stall it completely, the same mechanism Hoffmann points to for siphon drawdown problems.
If your drawdown drags on for a long time, treat it as a grind problem before you touch anything else.
Troubleshooting by Taste and Drawdown Speed
Sour or watery coffee can indicate an under-extracted brew, where water moved through the grounds too fast to pull out enough flavor. Bitter or harsh coffee often points to over-extraction, where too much time or too fine a grind pulled through unwanted compounds.
Use the table below to match what you’re tasting to the grind adjustment that fixes it.
| What You Notice | Likely Cause | What To Do |
|---|---|---|
| Sour, watery, weak cup | Under-extraction | Grind finer |
| Bitter, harsh, muddy cup | Over-extraction | Grind coarser |
| Slow drawdown or clogging | Grind too fine for the filter | Grind coarser |
| Fast brew, thin flavor | Grind too coarse | Grind finer |
If your drawdown finishes fast but the cup still tastes weak, check your dose before you grind finer. A ratio far from Hario’s 15 grams per 240 milliliters can look exactly like a grind problem when it’s really a recipe problem.
Adjust one variable at a time, taste again, and keep the grind change small each round.
For an immersion method that shares some of this same troubleshooting logic, our guide on grind size for French press brewing covers the coarser end of the same principles.
Conclusion
Start with a medium-fine grind, about the texture of table salt, or setting 14 to 16 on a Baratza Encore. Watch your drawdown speed and taste, then grind coarser if it stalls or finer if the cup tastes thin.
Match the texture and the behavior of the brew, not just a dial number, and let taste make the final call.