A job I did a few years back made me pause to think for a moment ...

How often do we find that plumbing, HVAC, and all manner of building components intrude upon "our" space? Then there is the matter of stuff being stored in the 'working space.'

Yet ... in the same building where they just can't keep stuff out of the electric room .... ever notice how the room for the elevator equipment is kept clear? No HVAC, no file boxes, and even the maintenance guy hasn't set up a desk in there.

I wonder why that is ... could the annual inspection have something to do with it?

Along the same lines ... if the offending pipe is part of the fire sprinklers, NEC is overridden by the sprinkler code. Likewise, there are limits as to how much a plumber can move a drain.