A: Most sprinkler heads contain a small bulb with a colored liquid inside. ... The liquid in the sprinkler head comes in a variety of colors, which indicates the temperature required to activate the head: Orange – 135° F. Red – 155° F. Yellow – 174° F.
Are sprinkler heads color coded?
They are color coded and each color represents the temperature at which it will explode, releasing the water flow. ... When the ceiling temperature reaches a specific level, the liquid inside will expand, causing the glass to break.2017-08-22
What is the color for sprinkler head for the hottest temperature?
Maximum Ceiling Temperature Temperature Rating Color Code (with Fusible Link)
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225 °F / 107 °C 250-300 °F / 121-149 °C Blue
300 °F / 149 °C 325-375 °F / 163-191 °C Red
375 °F / 191 °C 400-475 °F / 204-246 °C Green
475 °F / 246 °C 500-575 °F / 260-302 °C Orange
What do the colors mean in the glass bulb beads?
High temperature bulbs are coloured in blue up to 246 degrees Celsius, then purple up to 302 degrees Celsius, and black for anything above. These fall in the Very Extra High and Ultra High categories.2016-11-09
How many different colors of sprinklers are there?
Maximum Ceiling Temperature Temperature Rating Color Code (with Fusible Link)
--------------------------- ----------------------- ------------------------------
225 °F / 107 °C 250-300 °F / 121-149 °C Blue
300 °F / 149 °C 325-375 °F / 163-191 °C Red
375 °F / 191 °C 400-475 °F / 204-246 °C Green
475 °F / 246 °C 500-575 °F / 260-302 °C Orange
Can you paint sprinkler heads?
If the sprinkler head is painted over, the paint will actually protect the bulb, preventing it from breaking at the right temperature and prevent water from being released. Painting over the sprinkler head may also prevent the valve from dropping even if the bulb breaks.
What happens if you paint a sprinkler head?
If the sprinkler head is painted, the paint insulates the glass bulb, ultimately preventing it from breaking at the pre-set temperature or, even worse, sealing the valve – preventing it from dropping after the bulb breaks.2020-10-20