Well, the real problem is in the water, not sewer pipes.
In a new building in Memphis, strobe lights and klaxons were installed in all the office spaces and rest rooms. During the first fire drill all the alarms went off over the entire campus.
The strobe lights caused the automatic toilets to all flush at the same time - and continued until the alarms were reset.
The problem was the hydraulic pressure created by water moving through all of the pipes at top speed (limited only by the pressure from the source and drag from the pipes). When all the flushing stopped at exactly the same moment, the water pipes burst.
In a new building in Memphis, strobe lights and klaxons were installed in all the office spaces and rest rooms. During the first fire drill all the alarms went off over the entire campus.
The strobe lights caused the automatic toilets to all flush at the same time - and continued until the alarms were reset.
The problem was the hydraulic pressure created by water moving through all of the pipes at top speed (limited only by the pressure from the source and drag from the pipes). When all the flushing stopped at exactly the same moment, the water pipes burst.