Set up the right Wave
Use a Wave 185 and matching 185 paper for this 20 g / 320 g starting recipe. A V60 cone paper is not a substitute for the Wave's corrugated filter. The smaller 155 is better approached as its own small-batch setup: start with 15 g and 240 g water, then watch the available space.
This is an editorial recipe, not a taste-test result. Use medium grounds, 94°C / 201°F water, a scale, timer, kettle and a server with room for approximately 280 ml. We estimate yield by allowing 2 g of retained water per gram of coffee; your paper, grounds and stopping point can change it.
| Stage | 20 g / 320 g | 15 g / 240 g |
|---|---|---|
| Bloom at 0:00 | 60 g cumulative | 45 g cumulative |
| Pour at 0:40 | 160 g cumulative | 120 g cumulative |
| Pour near 1:10 | 240 g cumulative | 180 g cumulative |
| Final pour near 1:40 | 320 g cumulative | 240 g cumulative |
| Observe finish | About 2:45–3:30 | Often a little sooner; judge the cup |
Evidence: Kalita USA: Wave 185 design
Rinse without flattening; pour without digging
These pulse times are cues, not a demand to overflow the brewer. If water is still high, let it fall before the next addition. Keep the same rhythm when comparing grinder settings.
- Set the dripper securely on the server. Separate one paper, keeping its waves open, and seat it without pressing the base hard onto the outlets.
- Rinse gently from the center, then empty the rinse water. Avoid blasting the thin paper walls flat against the brewer.
- Add the coffee and shake lightly to level the bed. Tare the scale and start the timer.
- Pour the bloom target across the entire surface. Wait until about 0:40.
- Make the next three additions using the cumulative table. Pour a small moving stream mostly over coffee, not against the paper. Allow headroom between pulses.
- When the main dripping slows, note the finish time and remove the brewer. Stir or swirl the server before dividing it between cups.
Evidence: Kalita Wave branded brewing instructions
Separate blocked flow from an extraction problem
The three small outlets do not guarantee a fixed flow rate. Paper shape, fines and agitation still matter. Metal, ceramic and glass Wave models can respond differently; record the model with your recipe.
| Observation | Next test |
|---|---|
| Slow tail, muddy bed | Reduce swirling and try one coarser setting; inspect whether the filter is sitting tightly on the outlets. |
| A wall of dry coffee | Improve the first wetting, then keep the stream moving over the whole bed. |
| Fast and sharp | Try one finer step with the same pulses; verify the paper fits. |
| Dry or bitter with long drawdown | Try less agitation before changing ratio. A roast you dislike may remain bitter. |
| Balanced but thin | Try 21.3 g for the same 320 g water. |
| Overflow risk | Pause immediately; next time use fewer grounds, a larger appropriate brewer or separate batches. |
| Balanced but heavy | Dilute a measured cup sample. For the next 320 g brew, try 18.8 g coffee while keeping the same pours; retaste because a shallower bed can drain differently. |
| Mixed sharp and bitter notes despite a normal finish time | Check for dry patches and uneven wetting first. Keep dose and grind fixed while making a more even bloom and gentle moving stream. |
| Flat flavor without an obvious flow problem | Clean the server and dripper, then compare fresh coffee or a suitable different water in separate brews. A longer drawdown is not a cure for stale ingredients. |
Change one variable without losing the recipe
For an easier pour, combine the last two additions into one gentle continuous pour to 320 g after the bloom and first pulse. Note that fewer interruptions alter contact time; compare taste before changing grind as well.
For a light roast that stays sharp, try 96°C / 205°F. For a darker roast that feels harsh, try 90°C / 194°F. A stronger ratio may help a milk addition, while grinding excessively fine can only make the filter slower.
Keep batch scaling modest. For two large mugs, two 20 g brews are easier to control than forcing a deep bed into a 185. A drip machine or larger Chemex can suit larger batches with less repeated work.
Without a gooseneck kettle, use short controlled additions from a stable kettle you can handle safely. Keep the same cumulative targets, let the level fall between additions and avoid a high heavy stream that flattens the fluted paper. Do not transfer near-boiling water into an unsuitable improvised pouring vessel. If the stream cannot wet the bed without flooding it, a Clever or Switch offers a less pouring-dependent workflow.
Keep the outlet holes clear
After cooling, lift out the paper and grounds. Wash the dripper and server with the cleaner and method approved for their materials, rinse and dry. Inspect the three openings for trapped grounds; do not enlarge them or improvise modifications to fix a slow recipe.
Use care with hot metal and damaged ceramic or glass. A filter that tore or collapsed should be replaced before the next brew.
Sources & limitations
This guide combines source-based explanations and practical starting points. Coffee Jacob has not performed hands-on product testing or controlled tasting trials for this guide. Source check: 13 October 2026.