Airlocks are game-mechanics that are created when a non-solid Block (e.g. Torch) is placed under Water. Some of these blocks will create permanent airlocks around the block, whilst some only create a temporary airlock. The airlock can be used for breathing space, and resets the Player's air bubbles bar.
It is possible to create an airlock by placing one of the following blocks underwater:
- Torches and Redstone Torches
- Pressure Plates
- Daylight Sensors
- Falling Sand/Gravel
- Wooden Door
- Fences and Fence Gates
- Iron Bars
- Glass Panes
- Torches can be placed, but only temporarily, as they will loosen shortly after being placed.
- Slabs, Cake, and Pressure Plates occupy the lower part of a block, making them hard to use for breathing space under Water. However, they can be used on the ground stopping the flow of Water.