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HISTORY OF FIRE SPRINKLERS: 

 

SPRINKLED vs. NON-SPRINKLED TEST: 

 

HOW A SPRINKLER HEAD WORKS

 

SYSTEM TYPES: 

 

WATER FLOW SWITCHES: 

 

PRESSURE SWITCHES: 

 

CONTROL VALVES: 

 

TAMPER SWITCHES: 

  

FM 200: