Main Question or Discussion Point
An electrician and I were the 2nd shift maintenance crew in this factory-new on the job when a sprinkler head in the ceiling went off as a result of being too close to a newly installed heater. Panic and an irate foreman. Water building up on the floor. Well we'll just close the valve outside when we determine which one to close and that should stop the water as it bleeds off. It took us at least 20 minutes to locate the valve and close it. Water now several inches deep on the floor and the broken head still going full flow. I thought "it has to stop because the circuit has an open/water going out and because water doesn't compress it soon has to slow and quit. Nope! Water kept coming now for almost an hour. It was only when I opened the drain valve to let the pressure drain the water outside that the flow stopped from the sprinkler head. My question is why if water can't compress didn't the pressure quickly drop because of the broken and open sprinkler head? There must have been maybe a thousand feet of two inch pipe involved in that section of the system. Water was exiting at maybe a gallon in one or two seconds. And btw I turned off the jockey pump that keeps pressure on the system at about 60 lbs. and that did nothing.