So it happened again. The beer blew out the airlock leaving a water and beer mix behind. The airlock still bubbles as per usual. Now I'm wondering what I should do next.

  • Leave it as is
  • Replace the airlock with another sanitized airlock and sterile water
  • Just replace the water in the airlock
  • Replace the airlock with a blow out tube

Any of these the options make as much sense as the next one.

Beer airlock blow out

I might have over-pitched with a 1.4 pint (0.66L) starter for a 2 gallon Belgian golden strong ale batch.

  • You need to leave much more head room in the fermenter,
    – Robert
    Commented Mar 11, 2018 at 0:13
  • Yes, it's been a while since a pitched a yeast starter. It added a little bit of volume that i didn't quite take into account.
    – Martin
    Commented Mar 11, 2018 at 0:42

1 Answer 1


Just clean it up and replace the airlock sanitizer fluid.

If you have a second airlock just prep it and swap. If not just cover with sanitized foil while cleaning.

  • Also. Just a good rule of thumb. A blowoff tube is always a great idea. I recommend that simply being the standard instead of airlocks. Commented Mar 12, 2018 at 12:47
  • @ÞórgnýrThoroddsen each have their pros and cons. I don't use a blow off system when doing 1g batches. Commented Mar 12, 2018 at 13:59
  • I'll have to give a blow off tube a try then.
    – Martin
    Commented Mar 13, 2018 at 13:38
  • @Martin a blow off tube wouldn't prevent this. And should still be cleaned up all the same when it happens. In fact a blow off may even be worse by creating a siphon sucking out a lot of krausen and yeast with it. Headspace is the only thing to prevent this. Commented Mar 13, 2018 at 13:54
  • Ah, yes. I'll will not make the same mistake again; Forgetting to account for the starter.
    – Martin
    Commented Mar 13, 2018 at 13:57

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.