In wet pipe systems, the sprinklers are connected to wet pipe systems, so the sprinkler itself is filled with water under pressure.
When a home fire sprinkler is activated, this water is discharged immediately, effectively combating the fire before it has time to expand.
The wet sprinkler is the more popular of the two, mostly due to its simplicity and reliability. They tend to require very little maintenance, are easy to install, and work well in several environments—you’ll often see wet fire sprinkler systems in offices.
However, they cannot be used to protect a property where the temperature drops below 40 degrees Fahrenheit.
For that, you’ll need a dry fire sprinkler system.