This is where the AquaDam® will be inflated. If an AquaDam® is being installed
into a current, you must make sure the AquaDam® does not unroll too fast. If
this happens it will drift off-course of where you want it installed.
You need someone in front of the AquaDam® to make sure it doesn't unroll
too fast and to give it time to build up water for weight.
The blue hose in the top of the AquaDam® is attached to the fill tube.
You can see how the fill tube is taped to fit the size of hose.