ISS said that this will affect the A-side this week for ALL THE FLOORS.

https://patio.oulu.fi/fi/uutiset/kontinkangas-aapistie-5-paarakennus-viemariverkoston-huolto-12-1522024-viemarilinjojen
https://patio.oulu.fi/en/news/kontinkangas-aapistie-5-main-building-sewerage-network-maintenance-february-12-february-15

“we are renewing the sewer lines on the 1st floor part, so you must not pour anything into the sewers between 4:00 PM and 9:00 PM. The premises will be marked with notices on Friday 9.2.”

Antti