*Fire Sprinkler* - *Definition*: A device that discharges water or other extinguishing agents to suppress or extinguish fires. - *Types*: - *Wet pipe sprinkler*: Water-filled pipes, ready for discharge. - *Dry pipe sprinkler*: Air-filled pipes, water released when activated. - *Pre-action sprinkler*: Combination of wet and dry pipe systems. - *Components*: - *Head*: Sprinkler head, releasing extinguishing agent. - *Piping*: Distribution system for water or agent. - *Valve*: Controls water supply