The distillator is an item the player has to steal from the mourners in West Ardougne for Elena as part of the Biohazard quest.
To obtain this item, players must infiltrate in the mourners Headquarters while wearing the doctor's gown, which can be obtained by searching the box in Nurse Sarah's house. Second, they must kill a mourner (level 48) and a key will be automatically placed in the player's inventory. The key must be used to open the caged room, and to search the boxes which contain the distillator.
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