The radiator makes unbearable noises throu out the night, which drives her insane. We think that this is due to air pockets in the pipes, we can hear crackling and water drops.
The heating system is common to the whole building, and I cant turn off hot water.
How do i open this shit
Talk to the building owner.
If you get this wrong you’ll likely cause havoc across the whole building.
Especially because some idiot painted over the key and thread.