The Duotight Flow Stopper is a handy devicie to use while filling kegs or when transferring between kegs during filtering or after fining. Simply attach the Flow Stopper to the gas post of your keg, then when the keg is full it will automatically cut off flow and prevent excess beer from exiting your gas post and spilling onto the floor.

For even better results, we recommend using the Flow Stopper with the BlowTie Spunding Valve as shown in the accessories list to the right. When attached to the output port of the flow stopper the BlowTie will enable you to apply head pressure to the keg, meaning you can control the flow speed and reduce the foam generated in the filling process. You will need a short length of 8 mm OD EVABarrier tubing to connect the BlowTie to the outlet of the Flow Stopper.

• 2 x Duotight 8 mm x 5/8" FPT (DUO104)
• 1 x Duotight 8 mm elbow (DUO107)
• 1 x Duotight 8 mm x 1/4 in. flare (DUO106)
• 1 x Ball float
• 1 x Stainless spring
• 2 x 8 mm OD EVABarrier joiners
• 1 x Acrylic sight glass

Note that the stainless steel ball valve QD we list in the accessories is the best choice because the male flare port is horizontal which will keep the keg flow stopper facing upright.