"High flow" airlock?

[MrBJones]

I've switched to a 6.5 gallon carboy for primary fermentation (had been using a 5), so I'm not concerned with blowing off krausen etc. I'd like to do away with a blow-off tube, and just use an airlock from the start. But both of the last two batches I've done in the 6.5 (ESBs) had VERY rapid fermentation -- bubbles-per-second were so quick that they practically couldn't be counted. No temperature issues or anything that...in fact, both came out great (almost wish I had entered into a contest!). I'm concerned, though, that the amount of CO2 that was produced would have popped off a standard airlock. Is there an airlock that will allow a greater rate of CO2 to pass through it without popping?
Thanks!

 

[Jtk78]

I would still be ready for a blowoff depending on the yeast you use. This is a 7 gallon about 60 hours post pitch of WY1318

Same fermenter the next day

I did a Wit that also came up and through. I did have a blow off on that.

Also, if your airlock has a little plastic cross on the bottom as opposed to a completely open, cut that off.

 

[Hwk-I-St8]

I just always run a blow off. It's not an more/less difficult and I replace with a standard airlock when I do my first dry hop.

 

[plazola86]

Speidel sells an "oversized" airlock not sure if that would translate to better airflow. Blow off tubes are guaranteed better flowing though, why the change?

https://www.morebeer.com/products/replacement-airlock-speidel-plastic-fermenters.html

P.S hello from Allen, TX!

 

[kh54s10]

1) use the blow off tube even with the bigger fermenter. Sooner or later it will blow off.
2) a standard airlock will not blow off due to large amounts of co2 passing through. They will blow off if they clog with krausen.
3) even my blow off tubes (for a Better bottle 1/2" ID.) make a constant stream of bubbles at the height of fermentation.
4) or just use a blow off tube for the duration of the fermentation.

 

[PADave]

I always use a blowoff tube, unless I'm using my Speidel fermenter. There is enough head space and the airlock is huge.

 

[MrBJones]

Speidel sells an "oversized" airlock not sure if that would translate to better airflow. Blow off tubes are guaranteed better flowing though, why the change?

https://www.morebeer.com/products/replacement-airlock-speidel-plastic-fermenters.html

P.S hello from Allen, TX!

Hello neighbor!

My chamber is a Cool Brewing cooler. Am considering doing some styles that will require temperatures in the 40s and 50s...which means more frozen milk jugs. Don't want a blow-off jar/jug/whatever taking up room.

 

[marc1]

Try Fermcap and an open airlock (no water in it) for the most vigorous days of the fermentation. Seal it up while there is still activity.

 

[z-bob]

What about skip the airlock completely and just put a rubber ball over the mouth of the fermenter to act like a check-valve?