Question: what are the different types of fire sprinkler systems?
Answer: Wet pipe systems. Wet pipe systems are definitely the most commonly used fire sprinkler systems. ... 
Dry pipe systems. These are the second most popular fire sprinkler system type. ... 
Deluge systems. ... 
Pre-action systems. ... 
Foam water sprinkler systems. ... 
Water spray systems. ... 
Water mist systems.