Originally Posted by Glaurung30
I checked the lid and it was snapped on, but I have a little test that I do. I press down on the center of the lid. The water level in the airlock should usually goes up and the plastic piece rises and hits the top. It didn't do that. When I pressed on the center of the lid I heard a hissing sound coming from the base of the air lock. I think it had just worked itself loose enough that air was leaking out there. There is a nice ring of crust around the top though so I think I will be okay.
When I have a fear of busting the top and causing pressure to leak through the lid ill take the cap off the airlock attach a 1/2 in hose and let it drain in a pitcher. Do this after pitching and sealing the lid. The yeast will create its co2 atmosphere forcing air out but not letting any in