Now that water is on deck one or more individual sprinkler heads need to release to engage and discharge water.
Wet fire sprinkler system diagram.
8 fire department connection.
Otherwise known as an fdc or siamese connection since there are two inlets on the connection this connection is located on the exterior of the building.
Why choose a pre.
A fire sprinkler system is an active fire protection method consisting of a water supply system providing adequate pressure and flowrate to a water distribution piping system onto which fire sprinklers are connected.
Additional work for detection and special control equipment is avoided which again saves time and expense.
Manual wet systems keep water in the system at all times but are not backed up by a pump.
How they work a wet fire sprinkler system means that at all times the overhead fire sprinkler piping is filled with pressurized water.
Upon alert the pre action valve releases water flows in and the system essentially becomes a wet pipe system.
There are four main types of fire sprinkler system.
System description wet systems are the simplest and most common type of sprinkler system installation with relatively few components figures 1 and 2.
Wet systems use automatic sprinkler heads attached to piping containing water and connected to a water supply.
The system provides fixed fire protection using piping filled with pressurized water supplied from a dependable source at all times.
Wet fire sprinkler systems are by far the most common the simplest and the most affordable systems to install.
In a wet pipe fire sprinkler system the most common type in residential buildings cold water is stored under pressure in the pipes and is released immediately by sprinkler heads when the predetermined heat level is reached.
A combination manual wet standpipe and sprinkler system may have sufficient pressure to supply sprinklers.
Although historically only used in factories and large commercial buildings systems for homes and small buildings are now available at a cost effective price.
A wet system as defined in nfpa 13 is a sprinkler system employing automatic sprinklers attached to a piping system containing water and connected to a water supply so that water discharges immediately from sprinklers opened by the heat from a fire2.
Wet systems are the most common and reliable types of sprinkler systems.
Following the work the system is pressure tested and restored.
The pre action valve will only activate when an independent fire detection system detects a fire.
Connection used by the fire department to pump water into the fire sprinkler or standpipe system to supplement the building s water supply.
A wet system is used in areas that can be maintained above 40 f 4 c.
This is because no equipment other than the sprinkler heads are required to operate.
