Fire Sprinkler Heads -Guide To Fire Sprinkler Heads
This Fire Sprinkler Guide
is to help you find fire sprinkler information before you order sprinkler heads, fire sprinkler escutcheons and other fire sprinkler system parts.
A fire sprinkler system is an active fire protection measure, consisting of a water
supply system, providing adequate pressure and flowrate to a water distribution piping system, onto which fire sprinklers are connected. These sprinklers are
activated individually according to temperature. When the heat from fire reaches that particular temperature, for instance 155 degree, the sprinkler bulb will burst or
the fusible link with "melt" and allow the water system to flow under pressure onto the fire. Although historically only used in factories and large commercial buildings,
systems for homes and small buildings are now available at a cost-effective price. Fire sprinkler systems are extensively used worldwide, with over 40 million sprinkler heads fitted each
year. In buildings completely protected by fire sprinkler systems, over 99% of fires were controlled by fire sprinklers alone.
We all know what fire sprinklers are but, when we buy fire sprinkler heads or other sprinkler system
parts, we need to know how to choose the right one for each application.
Standard response or Quick response fire sprinkler? What is the difference?
The biggest difference between quick response and standard response sprinkler heads is in their
activation design. Quick response sprinkler heads activate slightly more quickly.
Physically, the only difference between a standard response fire sprinkler and a quick response fire
sprinkler is the size of the bulb—standard response sprinklers have a 5 mm glass bulb, while quick response fire sprinklers have a 3 mm glass bulb.
Standard Response (SR) Fire Sprinkler Heads
Standard response sprinkler heads work by wetting and cooling the areas in and surrounding a
fire to prevent it from spreading. After the fire consumes all of the fuel around it, it goes out. These sprinklers work independently of each other and will activate only when the heated air
from the fire reaches them.
Quick Response (QR) Fire Sprinkler Heads
Fire Sprinkler Temperature Ratings
Fire Sprinklers are rated for different temperatures for different applications. The most common
temperature ration is 155 degrees indicated by red colored liquid in the bulb. If you are replacing a
sprinkler head, you can look at the one you are replacing to find the rating or ID number, or you can look at other sprinkler heads in the systems to see what color liquid is in the bulb.
Fire Sprinkler Head Color Temperature Code (Fahrenheit)
Fire Sprinkler heads are color coded for Fahrenheit temperature by the color of liquid in the bulb. An
orange colored liquid in the bulb means it is rated at 135 degrees, red 155, green 200, and blue 286.
If the temperature of the sprinkler head reaches the color coded temperature, the bulb will break and
the fire sprinkler will activate. Other sprinklers in the area will not begin to dispense water unless each individual sprinkler head reaches the specified temperature for which it is rated.
What Size Sprinkler Head - 1/2" or 3/4"? How Do I Measure?
Fire Sprinkler Head Measurements
When measuring fire sprinkler heads, remember that 1/2" sprinkler heads have an inside diameter
of 1/2" and an outside diameter of approximately 3/4".
If you measure across the outside of the threads of a sprinkler head, and the outside diameter is
approximately 3/4", you have a 1/2" sprinkler head and should order guards and escutcheons for 1/2"
sprinkler heads. If you measure across the threads of the sprinkler head and the measurement is
approximately 1", you have 3/4" sprinkler heads and should order guards and escutcheons for 3/4" sprinkler heads.
See the Fire Sprinkler Videos
Fire Sprinklers and Automatic Stove Top fire extinguishers can save your home from destruction and
cut down on the water damage if a fire should occur in your home. It only takes about 100 gallons of water to extinguish a home fire using sprinklers and it could save your life!
Stove Top FireStop Automatic Fire Extinguisher Demo
Bob The Builder Sprinkler Video
The Case for Residential Sprinklers (10:30 minutes)
ABC Good Morning America- October 10, 1997 (5:45 minutes)
NBC TODAY Show- Fire Trailer Demo (8:36 minutes)
Local News Coverage of High Rise Fires and Sprinklers (36:45 minutes)
Less Than Five Minutes - Information Video (11:10 minutes)
High Rise Retrofit Documentary (5:31 minutes)
The Gayle King Show (4:08 minutes)
"Streets of Fire" (4:16 minutes)
Residential Fire Sprinkler Information (3:27 minutes)
Residential Fire Sprinkler Public Service Announcement (1:46 minutes)
Residential Fire Sprinkler Public Service Announcement (0:40 minutes)