" Key for the door that leads from the sewers to the sewage treatment plant."
Sewer Passage key is a key item in Resident Evil: Revelations 2.
The key is used to open the door toward the sewer passage.
It can be found inside a small room in the sewers, where there's a body of Evgeny Rebic during Episode 3: Judgement.
- Tada, Takuji, ed (2015). BIOHAZARD REVELATIONS 2 ULTIMANIA. Square Enix.