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This is a very easy-to-create structure that helps put out fires in a player's house without flooding it all the time.
It should be built like this:
|Top and bottom layers||Middle layer|
Any of the empty boxes above may contain wool.
Players who place these around their house should place at least one near chests and other valuable, flammable blocks. When deciding where to place them, players should remember that the water will only spread eight blocks and will head towards any holes in the floor within that radius without spreading in other directions if any are present. Additionally, they should be careful to place them close enough to the valuable blocks that they will spread the water before the fire destroys the valuable blocks.