|Note: The in-game itemname is Door key, identical with Door key.|
- "Old key, apparently even Soviet-made, labeled "pumping station"."
Unlocks one of the doors to the pumping station inside the Factory.
Where to find
On a bench in the Factory locker room on the 2nd Floor.
- Optional requirement for Sanitary Standards, p. 1.
The Door key opens a second door that also leads to the pumping station.