Guides
Batch brewing is a project you start and finish. Continuous brewing is a routine you maintain — and the numbers that keep it stable are all published.
By Scooter M.·Published September 6, 2026
The short answer
Draw finished kombucha off the spigot and immediately replace it with fresh sweet tea, repeating indefinitely. Kombucha Kamp's published guidance is to “replace no more than 25–35% of the total volume at once to maintain microbial balance”, with the first batch fermenting 7 to 10 days and subsequent batches needing only 5 to 7. A full clean and reset is published as every 6 to 12 months.
Batch brewing is a cycle with a beginning and an end: brew tea, add culture, wait a fortnight, empty the jar, start again. Continuous brewing removes the emptying. The vessel stays permanently occupied by a large volume of mature kombucha, and you take from the bottom and give back at the top.
That one change has consequences that are easy to miss. The culture never gets diluted to a fresh, vulnerable state, so it never spends days in the risky window above pH 4.2. The flavor stabilizes, because you are always tasting an average rather than a snapshot. And the vessel is opened far less often, since the spigot does the work a ladle used to do.
The published advantages list from the same source is short and honest: less cleaning and maintenance, consistent flavor, and safer brewing. The first and last of those are straightforwardly true and follow directly from the mechanics above.
There is one number that makes a continuous brew work, and it is a ratio rather than a volume. The published guidance is to replace no more than 25 to 35 percent of the total volume at once — described elsewhere in the same guidance as refilling around 25 percent with sweet tea while 75 percent stays as mature fermented tea.
| Vessel | Total volume | Draw off at 25% | Draw off at 35% |
|---|---|---|---|
| 1 gallon | 128 oz | 32 oz | 45 oz |
| 1.5 gallons | 192 oz | 48 oz | 67 oz |
| 2 gallons | 256 oz | 64 oz | 90 oz |
| 3 gallons | 384 oz | 96 oz | 134 oz |
| 5 gallons | 640 oz | 160 oz | 224 oz |
Look at the one-gallon row and the problem with small vessels becomes obvious. Twenty- five percent of a gallon is a quart — barely two bottles. That is why a gallon is not enough for this method, and why the published sizing guidance for a continuous brew vessel is 2 to 5 gallons, on the grounds that “a smaller vessel will become overrun with too much SCOBY and sour Kombucha, making flavor balance difficult to achieve”.
The first fill is an ordinary batch brew, just larger. Sweet tea at the published ratio — one cup of sugar per gallon of tea, with four to six tea bags or two tablespoons of loose leaf per gallon — cooled to room temperature, plus the culture and its starter tea. Then the first fermentation runs 7 to 10 days, which is longer than subsequent ones because the vessel is starting from nothing.
Fill height matters more here than in a batch. The liquid level must sit above the spigot inlet with a margin, because the bottom of a continuous brew accumulates yeast sediment and you do not want to be drawing it into every glass. Leave a few inches between the spigot and the floor of the vessel, which is a spigot placement question as much as a filling one.
A vessel large enough that a quarter of it is a useful draw, a spigot you can trust against a low pH, and something to confirm the vessel is where you think it is.
Kombucha Kamp
About 2.2 gallons of glass on an acacia stand with a stainless spigot, and the only vessel here where you can see the pellicle, the yeast strands and the fill line at a glance.
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Craft a Brew
The one gallon jar in this group whose valve grade is published — 304 stainless — which is the single specification that decides whether a spigot belongs anywhere near kombucha.
#ad Price as of October 18, 2026. How this is funded.
Micro Essential Lab
A 0.0 to 6.0 range in 0.5 steps, which puts four separate color matches inside the 2.5 to 3.5 window kombucha lives in — a 1-to-14 strip gives you one.
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Once running, the routine is short. Brew sweet tea at the published ratio and let it cool completely. Draw off up to a third of the vessel through the spigot into bottles. Pour the cooled sweet tea back in. That is the whole cycle, and subsequent batches are published as needing only 5 to 7 days.
Two rules keep it stable. Never add warm tea — it stresses the culture and it is the fastest way to turn a healthy continuous brew into a sluggish one. And never draw off more than the published third, because the remaining mature liquid is what acidifies the new tea quickly enough to keep the vessel safe.
The drawn-off kombucha goes straight into pressure-rated bottles for a second ferment, exactly as it would from a batch. Nothing about continuous brewing changes the bottling stage.
A continuous brew accumulates two things: pellicles at the top and yeast sediment at the bottom. Neither is a problem in the short run and both eventually become one — pellicles take up volume that should be liquid, and heavy sediment starts finding its way into the spigot.
The published interval for a full clean and reset is every 6 to 12 months. That means decanting the mature kombucha, removing the excess pellicles, cleaning the vessel and the spigot properly, and refilling with the kombucha you set aside plus fresh sweet tea. The surplus pellicles go to a SCOBY hotel or to another brewer.
The spigot is the part that needs real attention at a reset. It is the one component in constant contact with an acidic liquid, it comes apart, and things grow inside it that you cannot see from outside. Cleaning kombucha equipment covers taking one down.
For some people, plainly yes. For others it is a worse fit than the batch method they already have, and the honest answer depends on three things that have nothing to do with the kombucha.
The first is consumption. Continuous brewing only makes sense if you drink enough to draw off a quarter of a large vessel on a regular cycle. A household getting through two bottles a week will find a three-gallon vessel drifting steadily more sour, because the draws are too small and too infrequent to keep it fed.
The second is counter space. A two-to-five-gallon vessel with a spigot lives permanently in one place, at a height where a bottle fits underneath the tap. That is a real piece of kitchen real estate, and it is the reason a lot of continuous brews end up back as batch brews.
The third is variety. A batch brewer can change tea, change flavoring and start again in a fortnight. A continuous brewer is committed to one profile until the next reset, which is either restful or restrictive depending on temperament.
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Ranked on the published rubric. Every row jumps to that product's full write-up below; the button goes straight to Amazon.
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 | Score8.5 Kombucha Kamp Glass Continuous Brewer with Stand About 2.2 gallons of glass on an acacia stand with a stainless spigot, and the only vessel here where you can see the pellicle, the yeast strands and the fill line at a glance. | Watching the culture work | 8.5out of 10 | |
| 2 | Craft a Brew Kombucha Jar with Valve (1 Gallon) The one gallon jar in this group whose valve grade is published — 304 stainless — which is the single specification that decides whether a spigot belongs anywhere near kombucha. | A spigot you can check | 8.0out of 10 | |
| 3 | Score8.3 Kombucha Kamp USA Handmade Stoneware Continuous Brewer Crock Roughly 2.5 gallons of US-made handmade stoneware with a stainless spigot, and the only vessel here whose dimensions are given as a range because each one is thrown by hand. | The largest published capacity | 8.3out of 10 | |
| 4 | Micro Essential Lab Hydrion 9200 Spectral pH Strips, 0.0-6.0 A 0.0 to 6.0 range in 0.5 steps, which puts four separate color matches inside the 2.5 to 3.5 window kombucha lives in — a 1-to-14 strip gives you one. | Reading kombucha’s actual pH band | 8.8out of 10 |
#1 · Watching the culture work
About 2.2 gallons of glass on an acacia stand with a stainless spigot, and the only vessel here where you can see the pellicle, the yeast strands and the fill line at a glance.
Who it is for. A continuous brewer who wants to see what is happening, and who has an open shelf or an island to put it on.
Source: Kombucha Kamp published vessel specifications (capacity, vessel and stand heights, spigot material), kombuchakamp.com/glass-continuous-brewer.html, retrieved 2026-09-01
Skip it if. Your only free counter is under a cabinet. At 18 in with the stand you will not get the cover off, let alone the pellicle out.
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#2 · A spigot you can check
The one gallon jar in this group whose valve grade is published — 304 stainless — which is the single specification that decides whether a spigot belongs anywhere near kombucha.
Who it is for. A batch brewer who wants a tap for tasting and bottling, and who wants the spigot’s material in writing.
Source: Craft a Brew published dimensions, valve grade and care instructions, craftabrew.com/products/kombucha-jar-with-valve, fetched 2026-09-01
Skip it if. You want to run continuous brew. One gallon does not hold enough liquid to keep a stable culture while you draw off a bottle at a time; go to 2 gallons or more.
#ad Price as of October 18, 2026. How this is funded.
#3 · The largest published capacity
Roughly 2.5 gallons of US-made handmade stoneware with a stainless spigot, and the only vessel here whose dimensions are given as a range because each one is thrown by hand.
Who it is for. A committed continuous brewer with counter space, who wants the biggest published capacity and a stainless tap in the box.
Source: Kombucha Kamp published crock specifications (capacity, height and shoulder-width ranges, stainless spigot), kombuchakamp.com/usa-handmade-stoneware-continuous-brewer-crock.html, retrieved 2026-09-01
Skip it if. You measure your shelf to the inch. A vessel whose height can be 12 in or 14 in is not the one to buy for a tight gap.
#ad No live price feed yet, so no number is shown rather than a stale one. How this is funded.
#4 · Reading kombucha’s actual pH band
A 0.0 to 6.0 range in 0.5 steps, which puts four separate color matches inside the 2.5 to 3.5 window kombucha lives in — a 1-to-14 strip gives you one.
Who it is for. Every kombucha brewer. This is the cheapest instrument on the site and the one that answers the safety question.
Source: Micro Essential Lab published product specification (range, 0.5 graduations, 100 strips per vial, packaging), microessentiallab.com/product/hydrion-9200-spectral-0-0-6-0-plastic-ph-strip, fetched 2026-09-01. Strip length from retailer listings.
Skip it if. You need a number to one decimal place for a written record. Buy a calibrated pH meter; strips are for reading a band, not a value.
#ad No live price feed yet, so no number is shown rather than a stale one. How this is funded.
Every specification cited on this page came from one of these documents, retrieved on the date shown against the product it belongs to.
The recipe, the timeline, the failures and the safety questions — answered directly, in the order a home brewer meets them.
Three continuous brew vessels compared on published capacity, height with stand and spigot material — plus the tapless option.
Why a one-gallon kit cannot run continuous brew, and the published capacities and heights of three vessels that can.
Which brewing jars publish their valve grade, why 304 stainless is the number that matters, and when a spigot is the wrong idea.
The full one-gallon method with real ratios, temperatures and timings — what to buy, what to do each day, and what the two fermentations are for.