How would you know...?
a dry sprinkler system is designed to be filled with pressurized air. in the event of a fire, the head would melt, and trigger a pressure change in the system, releasing the dry pipe valve which would let water pass through the system to get to the fire. here's the question, though: What if there was water in the system, when would you know? likely the answer would be:
- on the date that a technician is scheduled to check the auxiliary drain
- on the date of the first freeze event.