Foil instead of airlock

[Elbone]

You foil guys must not have fruit flies where you live.

[bikefoolery]

It will blow off gas when there is enough pressure to open the silicone stretchy valve.

heh

I'm hard up for

The Fool.

[SocietyDweller]

I'm using foil once in a while. First time I had to do it was because my airlock was always poping out (wrong size). After that, I used it 3-4 times. Never had any issue.

[straight cash homey]

i use foil all the time, but i also dont have fruit flies

[EagleDude]

I use foil all of the time during the initial fermentation. Since I am fermenting in 6 gallon carboys, I can always expect a little blowoff during this period (not quite enough head space). I form the foil with a little down spout to direct the overflow, then switch to a cap and airlock once fermentation starts to die down.

[brewinhard]

You will be just fine using the foil method. Just be sure to get an airlock on that sucka' as primary fermentation starts to slow down to minimize oxidation from occurring.

[TheDarkSide]

The Hanson Brothers totally agree to puttin' on the foil.

[Evan B]

I've been using foil for my last 20 or so brews with zero problems. I've even seen a fruit fly or two in my house before, but they never seem to make it in to the fermentation fridge.