A Certified Fire Protection Specialist (CFPS) briefly explains the proper installation of fire pump sensing lines, and answers the following important questions:
0:18 What is a fire pump sensing line?
0:42 Why do fire pumps need to monitor pressure?
0:48 Fire pumps vs Jockey pump
01:00 How do automatic sprinkler and fire pump systems operate?
1:45 Fire pump pressure settings (Cut-in and Cut-out pressures)
02:20 Sample cut-in and cut-out pressure settings tabulation
02:54 Can sensing lines be combined?
03:10 Why it shouldn't be tapped above the alarm check valve
03:40 Sensing line tapping point connection
03:54 Pressure actuated sensing line piping size and material
04:24 Pressure snubbers: Inverted check valve with a drilled hole.
04:58 Test assembly arrangement and use
05:23 Benefits of proper sensing line installation
06:02 Key Takeaways
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Other resources:
-This fire pump layout used in this video was obtained from the NFPA 20 handbook, courtesy of Stephan Laforest, president of Summit Sprinkler Design Services, Inc.
-The sprinkler animation in this video is obtained from the Home Fire Sprinkler Coalition.