This is more curiosity than anything.
I’ve been watching my airlock and noticed something curious. I’m using the S style airlock. The output of the beer has pushed the liquid in the airlock to one side which is normal.
We recently had a low pressure move through followed by a high pressure system moving in now. As the backend of the low pushed its way through the area I noticed the liquid in the airlock moved back to almost equal. This morning the liquid had pushed back to one side of the S as observed before.
Will the barometric pressure cause this movement in the airlock? It seems logical to me.