[haeffnkr]

Hi,
I have been using a 3 piece air lock with starsan in it for a while,  The airlock assembly is in the stopper in my 14 gallon fermenters.

During the first few days of active fermenation the starsan bubbles all out of the air lock and I have to keep adding more and have the fear it blowing it all out and allowing air into the brew. I usually dont have a yeast blow out problem.

Is there a better air lock design or should I just use a blow off tube or any other suggestions to keep a safe amount of starsan in the airlocks?

thanks Kevin

[denny]

How about using less?

[stpug]

Vodka also works as a sanitary liquid in the airlock and since it doesn't foam it generally doesn't suffer the same problem that starsan does.  Vodka does tend to evaporate a little quicker than water/starsan so just keep an eye on it.

[jeffy]

I don't even use an airlock during initial fermentation.  The reason yours bubbles out is from the CO2 escaping, which would not allow air to ingress anyway.  When it calms down I install one. 
If you are still nervous, I'd suggest a blow off hose with the end in a jar of sanitizer.

[haeffnkr]

Thanks for the good suggestions.

Kevin

[brewinhard]

Mine do the same during the more vigorous part of fermentation. No big deal. When it looks low, just pop off the top and spray some more starsan from a spray bottle into the chamber.