System Types & Components: NICET ITWBS Level II topic guide
System Types & Components carries 16% of the NICET ITWBS Level II blueprint used in this course, the third-largest of its 7 weighted areas. It spans 9 concepts. The course teaches it in 1 study unit: System Types & Components: Wet, Dry, Preaction, Deluge.
What System Types & Components covers
- What defines a wet-pipe system? — NFPA 25 2023 Ch 5
- What defines a dry-pipe system, and how does it trip? — NFPA 25 2023 Ch 5
- What makes a preaction system different? — NFPA 25 2023 Ch 5
- What makes a deluge system different? — NFPA 25 2023 Ch 5
- What do the standpipe classes mean? — NFPA 25 2023 Ch 6
- How must control valves be kept, and why does it matter? — NFPA 25 2023 Ch 13
- What does a fire pump do, and what types exist? — NFPA 25 2023 Ch 8
- What water-supply components does NFPA 25 cover, and what is the FDC? — NFPA 25 2023 Ch 7/9
- What test do backflow assemblies on the fire line require? — NFPA 25 2023 backflow provisions
Common mistakes in System Types & Components
- preaction and deluge are the same (preaction has CLOSED heads; deluge has OPEN heads)
- a dry-pipe system has no water because it never fills (it fills and discharges once the valve trips)
- any standpipe class can be used by occupants (Class I is for the fire department; Class II is for occupants)
Key terms for System Types & Components
fire pump - boosts supply pressure/flow · FDC - fire department connection
How System Types & Components connects to other areas
- What test do backflow assemblies on the fire line require? links to What is the forward flow test, and how is it different from the main drain? — Testing Procedures & Flow-Test Math
- What does a fire pump do, and what types exist? links to What is the fire-pump annual flow test, and what must 150% flow hold? — Testing Procedures & Flow-Test Math
- How must control valves be kept, and why does it matter? links to How often are control valves inspected, and what changes it? — Inspection Frequencies & Procedures
Official references for System Types & Components
- NFPA 25 2023 Ch: 5, 6, 13, 8, 7/9
- NFPA 25 2023 backflow provisions
In the app this area comes with 9 memory cards and 16 module-quiz questions and is part of the free starting modules.