Sparger

noun

1. A sprinkler; usually, a cup with a perforated lid, or a pipe with a perforated nozle, used for damping paper, clothes, etc.
2. In brewing, a perforated cylinder, or a series of disks, for discharging hot water in a fine shower over grain falling into a mash-tub.
3. A vessel with a perforated cover, for sprinkling with a liquid; a sprinkler.
4. A vessel with a perforated cover for sprinkling a liquid.