Originally Posted by Bobby_M
It's a non ventable overpressure relief. If you need to manually vent, you'll have to press the gas in poppet with something like a screwdriver.
Sorry there is actual three holes on the lid of the corny kegs. It's a raised bump with three holes and if I look through the holes there looks like there is some kind of plastic tab or something.
When you say "press the gas in poppet with something like a screwdriver" do I put something in those three holes and press down? I tried that and I pressed down on that plastic thing inside and it wouldn't move.
I have the kegs filled with water and on CO2 to test them out and I swear when I had them taken apart the lid didn't have a hole on the underside of it.