I buy universal bungs... you might know.. the ones that don't fall in because they have a lip.
These bungs have a 'predrilled hole'. Not sure who drilled that hole before I got it, but there it is, a hole. Then, I insert into bung hole either a blowoff tube or an airlock. Now, the airlock will most likely widen that hole to the point where the blowoff is no longer being satisfied with the air tightness of the hole. This is because the airlock stem is winder and stiffer than the blow off tube. So the bunghole can only be used with the airlock. It is not longer an acceptable piece of early fermentation blowoff session.
Once I upgrade my secondaries, I will no longer need to slut my bungs with airlocks and hence have an exclusive inventory of blowoffs-friendly virgins, which should be a nice thing.
These bungs have a 'predrilled hole'. Not sure who drilled that hole before I got it, but there it is, a hole. Then, I insert into bung hole either a blowoff tube or an airlock. Now, the airlock will most likely widen that hole to the point where the blowoff is no longer being satisfied with the air tightness of the hole. This is because the airlock stem is winder and stiffer than the blow off tube. So the bunghole can only be used with the airlock. It is not longer an acceptable piece of early fermentation blowoff session.
Once I upgrade my secondaries, I will no longer need to slut my bungs with airlocks and hence have an exclusive inventory of blowoffs-friendly virgins, which should be a nice thing.
I use a piece cut off from an old "S" type airlock in one end of the blow off tube to insert into the hole,the other end in a jug 1/3 full of water with a splash of starsan. Nice tight holes always...
