QA

How To Use An Airlock For Fermentation

How to use an airlock Fill the airlock halfway with water, as shown on the image above. Insert the airlock into a bung or grommet at the top of your demijohn or brewing bucket. Leave to ferment. Once the fermentation has started you will see bubbles rising through the water.

Do you leave the cap on the airlock?

The cap is meant to be left on. If your airlock is like the ones I have, there should be four pinholes in the red cap that lets air (and C02) through. In any case, it should be able to vent around the edges of the cap.

Do you put water in an airlock?

You should fill a three-piece airlock approximately halfway up with water. The advantage of three-piece airlocks is that they can be taken apart for cleaning and are less prone to getting blocked with krausen during periods of very active fermentation.

Do you use an airlock during primary fermentation?

While not required, using an airlock during primary fermentation will allow excess CO2 to leave the fermenter and prevent oxygen and bacteria from entering. Even though you don’t have to use an airlock during fermentation, most people choose to do so as a cheap insurance policy against infection and blowouts.

What does the airlock look like during fermentation?

The airlock is that funny little bit of plastic that affixes to the top of your brew bucket or carboy and bubbles away during fermentation. Except sometimes it doesn’t bubble when you think it should, and sometimes it bubbles when you don’t expect it to.

When should airlock start bubbling?

Within 24-36 hours, carbon dioxide normally starts bubbling through the airlock, as long as everything is working correctly and if the fermenter is sealed properly. Fermentation can take as little as 3 days if you are using a fast-acting yeast and the temperature is ideal.

What liquid do you put in an airlock?

Bottled spring water or filtered water are best and recommended to use as liquid in the airlock. Vodka will certainly keep the lock sanitary too. There is no real trick to it, follow common sense and good process control. Using a straight sanitizer is vehemently not recommended.

What liquid goes into airlock?

I like to use a strong ethanol such as grain alcohol (everclear), or 151 proof rum. Other, more budget friendly options include a Starsan solution or a strongly acidic solution (pH <2) . The main thing here is to make sure that whatever is in your airlock is wine friendly and antimicrobial.

Should I stir my wine while it is fermenting?

Once you add the yeast you will want to stir the fermenting wine must around as much as you can. The goal is to not allow any of the pulp to become too dry during the fermentation. Stirring it around once or twice a day should be sufficient. With your fermentation there is much less pulp.

How do you cover wine fermentation?

Instead of using an Wine Airlock during the Primary Fermentation, simply cover the container with a thin towel, cheese cloth or something similar. You can secure it by tying it down with a string to make sure it doesn’t get knocked or blown off.

Should I cover wine during fermentation?

The reason you use a fermentation airlock is to protect the wine from contamination. Leaving the lid and airlock off will allow the primary fermentation to start sooner and continue more rapidly, but it can also leave the fermentation susceptible to contamination should it not start in a timely fashion.

How do I know when fermentation is done?

Fermentation is finished when it ceases to off gas. The airlock is still and has reached equilibrium. If you brew in glass, look at the beer, the yeast ceases swimming and flocculates (settles) on the bottom. Pull a sample and taste it.

How do you know when fermentation has started?

Visual signs of fermentation Bubbles of CO2 forming in the wort. The airlock, bubbles and levels. Krausen forms and then falls. Yeast particles floating around in the wort. Flocculation: yeast sinking to the bottom.

How often should my wine airlock bubble?

Primary fermentation took three to five days and produced 70% of our alcohol while secondary fermentation takes up to two weeks just to get the last 30%. The foam will disappear and you will see tiny bubbles breaking at the surface of your wine. Your airlock will now be bubbling every 30 seconds or so.

Should I stir my mash during fermentation?

You should not stir your homebrew during fermentation, in most cases, as it can contaminate the beer with outside bacteria, wild yeast, and oxygen which leads to off-flavors or spoilage. Stirring can have disastrous potential to ruin your beer in a variety of ways.

Why is my ferment not bubbling?

If the airlock is not bubbling, it may be due to a poor seal between the lid and the bucket or leaks around the grommet. Fermentation may be taking place but the CO2 is not coming out through the airlock. This can also be caused by adding too much water to the airlock.

How long does it take for fermentation to bubble?

For the first 12 to 24 hours, you won’t see much (if any) activity in the airlock. The yeast is taking this time to gather its strength and multiply its numbers. For the next 1 to 3 days, you’ll start to see bubbles popping rapidly up through the airlock.