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Fire Sprinkler Help Page & Fire Sprinkler Videos

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. 

VK101A 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 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

Fire Sprinkler Head Size 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)



Return To

Viking Standard Fire Sprinklers
Viking Quick Response Fire Sprinklers
Viking Institutional Fire Sprinklers
Viking Residential Fire Sprinklers

Globe Sprinklers


sprinkler color temperature Chart

Bulb Color Temperature Chart
Sprinkler Size 1/2" or 3/4"

Standard Coverage, Standard Response Sprinklers Guide

Viking Sprinkler Selection Guide

Viking Sprinkler Head Wrenches


Sprinkler Head Wrench Information sheet helps you determine which Viking sprinkler head wrench you need for installation.  Order Viking sprinkler head wrenches below.

 Viking Sprinkler Guides

•Fire Sprinkler Heads

(A) Standard Coverage, Standard Response Sprinklers
(B) Standard Coverage, Quick Response Sprinklers
( C) Extended Coverage Sprinklers
(D) Storage Sprinklers
(E) Institutional & Special Sprinklers
(F) Residential Sprinklers
(G) Dry Sprinklers
(H) Sprinkler Accessories
(I) Spray Nozzles and Window Sprinklers
(J) Flexible Sprinkler Connections

•Valves & Systems

(K) TotalPac® 2
(L) Wet Systems
     (L.2) EasyPac™ Riser Assemblies
(M) Dry Systems
(N) Deluge Systems
(O) Preaction Systems
(P) Flow Control / Pressure Regulation
(Q) Firecycle® Systems
(R) Foam Systems

•System Components

(S) CPVC Products
(T) VGStm Grooved Piping System


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