I played around the sewers opposite to Wellsping entrance and I was "clicking" any valve to find to open smth. And - nothing, but just by case I activate some electric boxes (I clicked on it, and white circle appears just that without sound). So I found another places that I could activate: skull paint on pipe, some paint looks like eye on pipe, another electric boxes. But nothing happend, no sound, nothing appears or open. I've searched another sewers and I found that same: some boxes are "clickable", but nothing happend. Did someone found what for are those things?
p.s. terrible sorry for my english ;p