Hose connection 9/16-18 UNF  closable with banjo This item can update your ADV belonging to sidemount unit (#7094; #7111). WARNING: Use of the shut off valve on bailout rebreather is strongly not recommended. Closed shut off valve can cause a vacuum in the loop while descending. The vacuum can cause serious issues including loop flooding and in worst case scenario can result into suffocation/drowning/death of the diver.