Best Glass Fermentation Airlocks of 2026

Mohammed Clark Avatar
Mohammed Clark
Last Updated: 7 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Glass Fermentation Airlocks are a useful addition to any home fermentation setup. These airlocks allow gases to escape during the fermentation process while preventing oxygen and other contaminants from entering the fermenting vessel. Made of durable glass, these airlocks are easy to clean and reuse. They come in various sizes to fit different types of fermenting vessels and are a great way to ensure that your fermented foods and drinks are safe and flavourful. The Glass Fermentation Airlocks are highly recommended for anyone who is serious about home fermentation.

At a Glance: Our Top Picks

DIAH DO IT AT HOME Fermentation Airlock Set Cover #TOP 1
DIAH DO IT AT HOME Fermentation Airlock Set
ftb score rating icon 9.9
6 Fermentation Airlocks & Rubber Bungs by Almost Off Grid Cover #TOP 2
6 Fermentation Airlocks & Rubber Bungs by Almost Off Grid
ftb score rating icon 9.8
DIAH Do It At Home Fermentation Set Cover #TOP 3
DIAH Do It At Home Fermentation Set
ftb score rating icon 9.6

Top 7 Glass Fermentation Airlocks

DIAH DO IT AT HOME Fermentation Airlock Set

6 x Airlocks + Bungs
Transparent
DIAH DO IT AT HOME Fermentation Airlock Set Cover
DIAH DO IT AT HOME Fermentation Airlock and Bored Bung Cork Stopper for Glass Demijohn Beer Wine Making (6 x Airlocks [6-Bubble Chambers] + Bungs)

The DIAH Fermentation Airlock is perfect for home-brewing beer, wine, and cider. With its six bubble chambers, it ensures proper fermentation by allowing gases to escape while preventing contamination. This environmentally friendly product is made from non-toxic materials, offering peace of mind as you create your beverages. Additionally, being made in Italy, it reflects quality craftsmanship. Using this airlock set will enhance your brewing experience, making it easier and safer to produce your favourite drinks at home.

What We Like
Ideal for home brewing
Non-toxic and safe materials
Quality Italian craftsmanship
Prevents contamination
Easy to use

6 Fermentation Airlocks & Rubber Bungs by Almost Off Grid

unknown
6 Fermentation Airlocks & Rubber Bungs by Almost Off Grid Cover
6 x Fermentation Airlocks & Bored Rubber Bungs for Glass Demijohns for Making Wine, Beer, Cider and Mead from Almost Off Grid

The Almost Off Grid Airlocks offer a complete set for home brewing enthusiasts. This package includes six high-quality rubber bungs and six chamber plastic airlocks, ensuring compatibility with standard glass demijohns. The bungs measure 31mm at the top and 26mm at the base, making them a perfect fit. These airlocks effectively release CO² during fermentation while preventing contamination, providing you with peace of mind as you create your wine, beer, cider, or mead.

What We Like
High-quality materials
Prevents contamination
Perfect for standard demijohns
Includes six sets

DIAH Do It At Home Fermentation Set

DIAH Do It At Home Fermentation Set Cover
DIAH DO IT AT HOME DIAH DO IT AT HOME Fermentation Airlock and Bored Bung Cork Stopper for Glass Demijohn Beer Wine Making 6 x Airlock [2-Chambers] with 6 Bored Bungs

The DIAH Fermentation Airlocks are essential for anyone looking to brew their own beer, wine, or cider at home. This set includes six fermentation airlocks and six bored bungs, designed to fit a variety of glass demijohns. The airlocks allow carbon dioxide to escape while preventing outside air from contaminating your brew, ensuring a clean fermentation process. The attached rubber bungs are safe and versatile, making them suitable for different fermentation vessels. With this product, you can enjoy a hassle-free brewing experience.

What We Like
Includes six airlocks and bungs
Prevents contamination during fermentation
Allows gas escape safely
Fits various fermentation vessels
Ideal for home brewing
#TOP 4

Almost Off Grid Bubbler Airlocks and Rubber Bungs

Almost Off Grid Bubbler Airlocks and Rubber Bungs Cover
Almost Off Grid 4 x Bubbler Airlocks and 4 x Bored Rubber Bungs for Glass Demijohns, Homebrewing, Winemaking, Mead Making, Beer Making, Cider Making, Fermenting

The Almost Off Grid Airlocks are designed for homebrewing enthusiasts. Each pack includes four durable, clear plastic airlocks that come with a dust cap to keep them clean. The set also features four bored rubber bungs, specifically designed with a hole for airlock fitting. This standard-sized, reusable design ensures you can use them multiple times, making your fermentation process smoother and more efficient. With these airlocks, you'll find it easier to manage fermentation for wine, beer, cider, and mead.

What We Like
Durable plastic construction
Includes dust caps
Reusable design
Standard size fits most
Convenient for various fermentations
#TOP 5

Almost Off Grid 4 Handy Airlocks for Fermenting

Almost Off Grid 4 Handy Airlocks for Fermenting Cover
Almost Off Grid 4 x Handy Airlocks for Glass Demijohns, Homebrewing, Winemaking, Mead Making, Beer Making, Cider Making, Fermenting

The Almost Off Grid Airlocks are designed to enhance your fermentation process. Made from durable, clear plastic, these 2-piece airlocks are built to last and are reusable, making them a practical choice for homebrewing enthusiasts. Each airlock features a built-in dust cover to keep contaminants at bay, ensuring your brews remain pure. With a standard size, they fit perfectly into the bored hole of a bung or the grommet in a drilled fermentation bucket lid, offering you flexibility in your brewing setup.

What We Like
Durable plastic construction
Reusable and cost-effective
Built-in dust covers
Fits standard fermentation equipment
Quiet operation
#TOP 6

Almost Off Grid Bubbler Airlocks and Bungs

Almost Off Grid Bubbler Airlocks and Bungs Cover
Almost Off Grid 2 x Bubbler Airlocks, Bored Rubber Bungs and Grommets for Glass Demijohns and Buckets for Making Wine, Beer, Cider and Mead

The Almost Off Grid Airlocks are essential for home brewing enthusiasts. These high-quality rubber bungs and plastic airlocks allow you to easily manage fermentation in both demijohns and buckets. They effectively release CO² during the fermentation process while preventing any unwanted contaminants from entering your brew. Designed to fit standard-sized demijohns, these reusable airlocks provide convenience and peace of mind, allowing you to enjoy brewing wine, beer, cider, or mead without hassle.

What We Like
High-quality materials
Fits standard-sized demijohns
Reusable design
Prevents contamination
Easy CO² release
#TOP 7

Almost Off Grid Bubbler Airlock and Bung Set

Almost Off Grid Bubbler Airlock and Bung Set Cover
2X Bubbler Airlock and 2X Bored Rubber Bung to fit 1 Gallon 6 Bottle Glass demijohns

The Almost Off Grid Airlock Set is designed to fit standard 1 gallon, 4.5 litre, and 6 bottle glass demijohns, ensuring versatility for your homebrewing needs. With loose fitting red caps, the bubbler airlocks effectively keep dust at bay, providing a clean environment for fermentation. You simply need to add water to the airlock and securely press it into the rubber bung, which is also easy to fit into the demijohn neck. This straightforward process allows you to focus on the exciting part—waiting for fermentation to begin!

What We Like
Fits standard demijohns
Dust protection with caps
Easy to install
Encourages fermentation
Buying Guide Image

Frequently Asked Questions (FAQs)

1. How do fermentation airlocks work?

Using the Fermentation Airlock is Easy! The water in the airlock acts as a barrier for the air getting into to fermentation vessel. When the CO2 escapes through the airlock it will bubble through the water. ... That also means that air is getting into your fermentation, preventing the anaerobic atmosphere.

2. Do you need an airlock for fermentation?

Can you ferment without an airlock? While airlocks are certainly super helpful, they aren't required. As long as you have a safe way to let the CO2 escape while also preventing excess oxygen from entering then you'll be good to go.

3. Can I remove airlock during fermentation?

Use a no rinse sanitizer like Star San, or vodka, in the air lock rather than water if it is a mold problem that requires cleaning. flars: Cover the carboy mouth with sanitized aluminum foil when you remove the air lock and bung. Keep floaties and flying things in the air from dropping in.

4. What is an airlock for fermentation?

A fermentation lock or airlock is a device used in beer brewing and wine making that allows carbon dioxide released during fermentation to escape the fermenter, while not allowing air to enter the fermenter, thus avoiding oxidation. There are two main designs for the fermentation lock.

Editor's Notes

During our glass fermentation airlock research, we found 100+ glass fermentation airlock products and shortlisted 7 quality products. We collected and analyzed 6,313 customer reviews through our big data system to write the glass fermentation airlocks list. We found that most customers choose glass fermentation airlocks with an average price of £7.68.

The glass fermentation airlocks are available for purchase. We have researched hundreds of brands and picked the top brands of glass fermentation airlocks, including DIAH DO IT AT HOME, Almost Off Grid.

Written by
Mohammed Clark Avatar

Mohammed Clark is an architect and a contractor. His architectural skills are not limited to designing the plan for structures alone, but it extends to aesthetics and home décor. Before establishing his firm, he worked under a construction firm for eight years. Mohammed has gathered enough experience from his time practicing as a professional architect and now has vast knowledge in home designs and aesthetics.