Update: Broken Sprinkler Pipe On Roof (Boerum Place Stairwell)

The flood source is a break in the sprinkler system piping, where the test valve is, on the roof.  The sprinkler system has to be turned off.  Repair service is on the way.   Residents in lines A, B, C, N, and M, in 120 Boerum Place, may have been affected.
Domestic water has been turned back on.