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Small Airlock

Product ID: 1193

A small airlock, ideal for limited space, lets out the fermentation gas and stops air from getting back in the ferm... read more

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Free UK delivery on all orders over £65

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A small airlock, ideal for limited space, lets out the fermentation gas and stops air from getting back in the fermenter.

This is a chamber style Airlock that fits our bored and rubber or cork bungs and grommets. In order to use this airlock half fill the bottom chamber with water, then replace the lid. Using an airlock protects the "wort" or "must" by allowing any carbon dioxide produced during fermentation to escape whilst preventing the  admittance of air.  Our air locks are also designed to be a visual aid.  The clear plastic means you can see how fast the CO2 is being created and assess how the fermentation is progressing.

The Small Airlock ensures a contamination-free environment for brewing vessels. Homebrewers and UK product designers have developed this essential equipment to be as effective and easy to use as possible.

Easy to use: Part fill with water and replace the lid into position. All you have to do then is check that water is in the airlock from time to time.

The small airlock can also cope with the more vigorous fermentations.

Sleek, easy-clean design

Minimises evaporation

What Is an airlock?

An airlock has many names, often called a fermentation lock, bubbler, trap or lock, although the proper term is an airlock. It is used during fermentation to stop air from entering the fermenter whilst allowing the carbon dioxide gas produced during fermentation to escape. This small airlock (handy airlock) has a two-piece design, the main chamber, and a top part.

Why Do You Need It?

An airlock is a vital piece of equipment in the brewing process. The airlock will stop any oxygen from getting inside the fermenter whilst allowing any gas made during fermentation to escape. The air surrounding us has microscopic bacteria that we are immune to, but the fermenting liquid may not. The bacteria will then attack the fermenting beer, wine or cider and turn it into vinegar - not very pleasant. The airlock is a barrier between the air and the fermenting liquid. Without an airlock, the risk of bacteria getting into the brew would increase significantly.

How Do You Use It?

The small airlock is simple to fill with water. Just remove the top part and pour water into the outer chamber, to about halfway, then replace the top. The airlock can then be inserted into the grommet on your fermenter lid or pushed in a bung first if the opening is wide. This type of airlock is almost silent in operation and is smaller than other types - ideal for those with limited headspace.


Spend Under £65 - Delivery charge £7.99

Next Working Day (if ordered by 2 pm)

Our standard delivery applies to orders being shipped to the UK Mainland excluding Scottish Highlands. (See below for further details.)

Spend over £65 - Free Delivery

Next Working Day (if ordered by 2 pm)

Our standard delivery applies to orders being shipped to the UK Mainland excluding Scottish Highlands. (See below for further details.)

.Collect From Brew Mart - Free Delivery

Next Working Day (if ordered by 4 pm)

No minimum spend to collect from us. Use our address as the shipping address. 

Your order will be held for a maximum 7 days. 

If you wish to have this delivered the standard delivery charge will be applied.


Some orders we can dispatch in an envelope via Royal Mail. 

Where this is the case, we will endeavour to reduce your delivery charge accordingly. 

This reduction is done at our discretion, and we will inform you of this before dispatching your order.

Delivery Surcharges

All other UK areas: 

Delivery costs £20 per box. This applies to the following postal areas:

  • Northern Ireland
  • The Isle of Man
  • The Isle of Wight AB 37-56 FK19-21
  • G84
  • IV 1-56, IV63
  • KA27-28
  • KW1-17
  • PA20-39, 41-49, 60-78 PH14-50.
  • TR21-25 ZE1-3

In exceptional cases, we reserve the right to charge delivery at cost.

Our Highlands and Islands deliveries are sent via Royal Mail or Parcelforce and usually take 2-4 days from dispatch.

If you are in any doubt as to the delivery charge applicable to your order, please feel free to email us on before placing your order and we can confirm.


Any special instructions that can help the driver to deliver your order would be appreciated, e.g. 'deliver next door if out', 'knock loudly bell not working' etc.

There is a space to enter these instructions during the buying process.


If the instruction is such that a signature is not required, e.g. leave in conservatory around the back if out, then this can only be dispatched under the courier instruction "no signature required". In this case, the carrier will not accept any liability. That means should the consignment go missing or get damaged there will be no compensation.


We thoroughly check all items before despatch and endeavour to ensure that your order is perfect before it reaches you. In the unlikely event that something has gone wrong, or you've changed your mind we're here to help. If you have any issues with your order, we would recommend that you contact us on 0114 2746850 or by email


In the event of an item damaged in transit, you must notify us within 24 hours of receiving the goods, giving precise details of the damage.
Failure to do so may mean your claim is not upheld as we only have 24 hours after delivery to claim from the carrier. There is an excess of £50 on the courier's damage insurance.


If you find any of the items of your order missing, please contact us within 24 hours so that we can correct our mistake.


If you decide that you placed your order in error, you wish to cancel your order, or you have changed your mind you must notify us within seven days of receiving the goods.

Any items ordered may be returned to us at your expense within ten days from the date that you contacted us.

Please note: We are only able to refund the cost of the goods minus any postage we initially paid. If you return only part of the order, we will only refund the value of the goods returned.

We recommend that you use a tracked secure service for any returns as we cannot accept liability for loss or damage during any return transit.


We are unable to offer refunds on any item that has been made to order or personalised unless it is faulty. This is in accordance with UK law, and your statutory rights are not affected.

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