Sealing Air Chucks
Sealing type air chucks employ a 'check valve' which seals the chuck, closing the air passage while it is not being used, and when used, it will open the core on the tyre valve allowing the pressure from the hose to be transferred to the tyre. When a 'live' non-gauged airline is used for inflation of the tyre, a sealing air chuck should be used.
Non-sealing Air Chucks
The non-sealing air chucks employ a 'check valve' which will not seal the opening of the chuck when pressurized; however, it will open the core on the tyre valve creating an 'opening' between the chuck and tyre. Therefore, a non-sealing air chuck should be used on a gauged airline in order to function properly.
Tail/thread size: 1/4" BSP