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I ordered this in December. Forgot about, just figured I'd never see it. I really wish I hadn't. Awful timing for a withdrawal from my bank account....
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How does a one-piece S-shaped airlock prevent suck back during cold crash? I ask because I once stuck my Speidel plastic fermenter in my spare fridge to cold crash a beer and one side of the fermenter caved in. They're built quite sturdy so that's some pretty powerful suck back. I can't imagine a simple, small airlock is going be impenetrable to such a powerful force.
 
How does a one-piece S-shaped airlock prevent suck back during cold crash? I ask because I once stuck my Speidel plastic fermenter in my spare fridge to cold crash a beer and one side of the fermenter caved in. They're built quite sturdy so that's some pretty powerful suck back. I can't imagine a simple, small airlock is going be impenetrable to such a powerful force.

I've read several older threads on the subject and it doesn't stop the suck back (air) per se, it supposedly prevents the liquid in the airlock from being drawn back into the fermenter which I have had happen with 3 piece airlocks... we'll see what happens. If all else fails, I guess I have 2 new airlocks I can use for other applications.
 
I've read several older threads on the subject and it doesn't stop the suck back (air) per se, it supposedly prevents the liquid in the airlock from being drawn back into the fermenter which I have had happen with 3 piece airlocks... we'll see what happens. If all else fails, I guess I have 2 new airlocks I can use for other applications.
I've read pretty much the same. It's for that reason that I don't cold crash at this time. I also read about using a large balloon to capture CO2 during fermentation and sucking that back in instead of oxygen when cold crashing. I may experiment with that down the road.
 
In line oxygenation from blichmann came today. Just in time hopefully a brew day Saturday or Sunday then.

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Just received ingredients for my ‘MaCC Daddy’ APA: Rahr 2 Row, Med Crystal, Magnum for 60 min and Cascade for 10 and 1 min additions. I’ll inoculate with Imperial Cablecar.
 
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