Carboy Cap - Brew2Bottle Home Brew
Carboy Cap - Brew2Bottle Home Brew

Carboy Cap


Regular price £2.95
85 in stock

Silicon sealing cap with 2 sealable openings for sealing carboys and other fermenting bottles. Fits PET bottles with narrow necks and glass demijohns from 10 to 34 litres.

A variety of possible applications:

  • for fitting a single airlock;
  • for fitting an airlock in one opening and an aeration hose in the other opening;
  • for an airlock and a stirring paddle;
  • for an airlock and a thermometer;
  • for an airlock and a rod for allowing use of a dry-hop mesh bag;
  • post-fermentation: for fitting a stainless steel siphoning pipe in one opening and using the other to pressurise the siphon.

  • made from flexible silicon
  • seals hermetically
  • alternative to a stopper with a hole
  • allows you to move the fermenting bottle without removing the airlock; to do this, all you need to do is remove the cap of the second opening.


Our deliveries to the UK mainland are via the Royal Mail and DPD.


  • £3.50
  • Up to 5 Working Days
  • Insured Delivery Service
  • FREE for orders £50.00 or above


  • £5.95
  • Next Working Day Delivery
  • Order Before 12pm
  • UK Mainland Only
  • Any Express orders placed on Saturday or Sunday will be dispatched the next working day.


Some items are available on Standard Delivery only. 


We hope you love your new Brew2Bottle purchase and are busy brewing, mashing, fermenting or bottling. However, if you are unhappy with the goods for any reason, please contact the Brew2Bottle team at sales@brew2Bottle or on the Hopline 01254 315082.

Please state your order number in the subject field of your email, so that we can access and amend your order quickly.

If the item is simply unwanted, we are happy to refund the cost of the item within 30 days. However, we don't cover the cost of returns on unwanted items. In the unusual event that you have received a damaged or faulty item, please contact our team as quickly as possible so we can rectify and get your brewing again soon.

As you would expect, this does not affect your consumer rights and our full ‘Terms & Conditions’ can be found at: