What type of fire sprinkler system always has water in the pipe?

A Wet Pipe Sprinkler System is designed to always have water in the pipes. This system is the most common type of fire sprinkler system, where the piping is filled with water and is ready to discharge as soon as the sprinkler heads are activated by heat from a fire.

When a fire occurs, the heat triggers the sprinkler heads to open, allowing the pressurized water in the pipes to spray out in order to control or extinguish the fire. The constant presence of water in the system means that it can respond quickly to detected heat, making it highly effective for providing immediate fire suppression.

In contrast, other types of systems operate differently:

• A Dry Pipe Sprinkler System has pipes filled with pressurized air or nitrogen instead of water. Water is released into the pipes only when the system is activated by a fire, causing the pressure to drop and a valve to open.

• A Pre-Action Sprinkler System requires both smoke or heat detection and the activation of the sprinkler heads before water flows into the pipes. This system adds an extra layer of safety against accidental discharge.

• A Deluge Sprinkler System features open sprinkler heads connected to a water supply that is usually kept closed until a fire activates a detection system, causing