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This oversized 3-piece airlock can hold 50% more water or sanitizer so your airlock is less likely to evaporate dry or get sucked dry. When the temperature drops, your fermenter will suck in solution from the airlock, and if the temperature drop is significant the airlock can be completely emptied. An empty airlock opens the door for airborne spoilants to make their way into your fermenter unchecked. The extra large 3-piece airlock offers your fermenter even more protection, and is especially useful when cold crashing.
One cool feature of this 3-piece airlock is that 1/2" ID tubing will fit onto the center post for use as a blowoff! This can be handy if you have a really active ferment that is blowing out the top of your fermenter.
Please Note: Airlock only - stopper not included.