Why did the Dry Sprinkler System Freeze?
-- All sprinkler systems are custom built; there is no one correct design, just a general idea of a correct design. Because each building is custom, each sprinkler system is custom. There is the clappper, air chamber, water, intermediate chamber, flow switch, low-air swicth, alarm defeat switch, fire alarm system. All of these parts interact with each other, and investigating failures have to take all of these into account to understand the cause.... Read More
Why Does Closing Some Gatevalves Show Trouble?
-- Early on, the concept of a silent alarm that did not call the firefighters (that's what a supervisory alarm basically is) was considered to be on the same level as a broken wire in the fire alarm system. It was a condition that needed to be fixed without evacuating the building... Read More
What is a Dry Sprinkler Valve?
-- When a fire starts burning in a building, action needs to be taken early... before the fire has grown out of control. Taking this action, sometimes before anyone even... Read More
Why Are There False Waterflow Alarms?
-- The question was asked "Intermittently, we are having a false waterflow alarm problem. For a while, it was OK, but we did the annual waterflow test and since then we get at least once a week a false water flow alarm ... Read More
What is a Waterflow Switch?
-- The fire alarm waterflow switch, a delayed action mechanical/electrical assembly, is a conventionally wired fire alarm device. The fire department reacts... Read More
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