In our old apartment, the pipes would freeze during the winter during the night, and in the morning sometimes the water that came out of the tap was blue at first. We spoke to a plumber, and he believed it was due to "backwash" from the upstairs neighbor's toilet. However, our old landlord assured us that this was perfectly normal, and our water would be fine if we let it run for a while every morning.
Now we have a new apartment, and it appears the pipes have frozen again - when I turn on the tap, the pipes sputter and barely any water comes out. However, this time the water that comes out is brown. Is this normal? Should we demand that our landlord fix it - can it even be fixed?
I really don't like the idea someone else's poop flowing through the same pipes as our clean water (note: I don't actually know that that's what's causing it to be brown - could it be another reason?)