Waterless air lock
I have a handfull of these in transit from Valley Vitners. Also for use in bulk aging. Once I can see exactly how they work, i will decide if I trust them or not.
I have a set up for making soda pop at home which is really just a CO2 dispenser. I would like to use this top to purge with CO2, then let it close to seal the Carboy. I worry about airlocks going dry.
I will post a note on how it works. Valley Vitners is usualy a bit slow to ship from my experience.
I like to forget about what is in the bulk aging room, so it actually does get to age.