"It's inscribed with a water design."
— Item examination

Water Key (水のカギ Mizu no kagi?) is a key item in Resident Evil 0. Before examination it is known as "Facility Key".


This key opens blue-coloured doors in the Umbrella Executive Training School in the Arklay Mountains.[1]


It is found in the Training Facility Basement's training room, where two Hunters must be fought in order to obtain it.[1][2]



  1. 1.0 1.1 Hamamura (ed.), KAITAISHINSHO, p.279.
  2. Sumner, Shotten, Owen (eds). Archives. p.192
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