Whenever I fill my Tobeco KF4 and open the juice control after the filling the air holes all leak a bit. Once I wipe them off it seems done however I would prefer this not to occur. Also, another question when the tank is filled should you be able to open and close the juice control without the air holes leaking juice? If I close and reopen the juice controls whenever juice is in the tank the air holes leak.
O-ring #16. 11mm x 1.5mm.