5.2 Coordinated Standards: NFPA 14, 20, 22, 24, 25 & IBC

Quick Answer: Identify the right companion standard; do not design it yet. Standpipes are NFPA 14 (2019). Stationary fire pumps are NFPA 20 (2022). Private tanks are NFPA 22 (2018). Yard mains, private hydrants, and lead-ins are NFPA 24 (2022). In-service inspection, testing, and maintenance (ITM) is NFPA 25 (2020). IBC 2021 occupancy and construction type often decide when the building must use NFPA 13.

The Level I outline does not ask a trainee to finish a fire-pump room or a Class I standpipe residual analysis. Task 1.4.2 Identify design standards footnotes NFPA 13, 13D, 13R, 14, 20, 22, and 24. Task 1.7.3 (closeout packages) footnotes NFPA 13 and NFPA 25. Those numbers tell you the depth: name the book and the interface, then hand the specialty calculation to the designer of record.

NICET’s July 8, 2024 Level I Selected General References list is equally blunt. Permitted in the test center / on-screen: NFPA 13, 13D, 13R, 291 (all 2022). Study-only — not permitted in the test center: IBC (2021); NFPA 14 (2019); NFPA 20 (2022); NFPA 22 (2018); NFPA 24 (2022); NFPA 25 (2020); NFPA 101 (2021); OSHA 29 CFR 1910 and 1926. Exam authors can still write identification items about those study-only titles. You will not have IBC or NFPA 20 open on the screen while you answer.

Why a sprinkler job is never “only NFPA 13”

Water-based protection is a system of systems. The sprinkler tree inside the building is 13/13D/13R. The pipe in the yard, the pump that boosts residual, the tank that stores duration, the standpipe outlets in the stair, and the ITM program after occupancy each have their own NFPA document. The contract summary should name them. If it does not, flag the gap instead of assuming 13 swallowed everything.

NFPA 14 (2019) — standpipes and hose systems

Official title: Standard for the Installation of Standpipe and Hose Systems. Catalog language for the 2019 edition states that the standard covers minimum requirements for the installation of standpipes and hose systems. Combined sprinkler/standpipe risers are common. When the same vertical pipe feeds sprinklers and 2½ in. hose valves, NFPA 13 still governs the sprinkler portion and NFPA 14 still governs the standpipe portion (outlet location, classification, residual/flow criteria). Level I identification: if the IBC or the summary requires standpipes (often a height or story trigger — IBC 2021 §905 is the usual code pointer), you are looking at an NFPA 14 document, not an extra chapter of NFPA 13.

Do not, at Level I, start assigning Class I versus Class III flows or reducing pump size because “the building is sprinklered.” That is Level II/III work. Your job is to spot that a standpipe is in scope and to keep standpipe outlets off the sprinkler-only plan notes.

NFPA 20 (2022) — stationary fire pumps

Official title: Standard for the Installation of Stationary Pumps for Fire Protection. NFPA’s document page states that NFPA 20 provides requirements for selection and installation of pumps so systems deliver adequate, reliable water in a fire. If the city residual at the required flow is below the sprinkler demand, the water-supply narrative will call a listed fire pump (electric or diesel) with a listed controller, suction piping, and a test header. Level I: recognize “pump required” on the code summary or water-supply schematic. Do not lay out a pump room, size an impeller, or set churn pressure — those are later-level tasks. If a stem shows a fire pump, the design standard to identify is NFPA 20, even though the sprinklers themselves remain 13/13D/13R.

NFPA 22 (2018) — private fire-protection tanks

Official title: Standard for Water Tanks for Private Fire Protection. Catalog abstracts of the 2018 edition describe minimum requirements for design, construction, installation, and maintenance of tanks and accessory equipment that supply water for private fire protection, including gravity tanks, suction tanks, pressure tanks, embankment-supported coated-fabric suction tanks, towers, foundations, pipe connections, valve enclosures, tank filling, and freeze protection. When the municipal main cannot provide duration, or the site is off-main, the summary may list a tank. Identify NFPA 22. Do not confuse a 13D stored-water tank in a house (sized inside 13D) with a site fire tank designed under 22; the document named for that tank is the tell.

NFPA 24 (2022) — private fire service mains and appurtenances

Official title: Standard for the Installation of Private Fire Service Mains and Their Appurtenances. NFPA’s document page states that 24 covers installation of private fire service mains and their appurtenances supplying private hydrants and water-based fire protection systems. This is the yard: buried pipe from the public main or tank to the riser, post-indicator valves, private hydrants, fire-department connections on the underground, thrust blocks, and bury depth. Lead-ins and private hydrants are 24 even when the building sprinklers are 13. NFPA 13 and 24 are written to work together; they are not interchangeable titles. A hydrant flow test still uses NFPA 291 methods; the installation of that private hydrant uses NFPA 24.

NFPA 25 (2020) — ITM of installed systems (closeout awareness)

Official title: Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems. NICET lists the 2020 edition for WBSL Level I study (the separate Inspection and Testing of Water-Based Systems certification uses a different exam stack — do not mix programs). NFPA 25 is not the book you use to layout a new system. It is the book the owner’s ITM program will follow after acceptance. Level I meets 25 at handoff: contractor’s material and test certificates, as-builts, and closeout packages (outline task 1.7.3). If a stem asks how often an inspector’s test is performed in occupancy, you are in 25 — and that frequency is outside this identification chapter. If the stem asks which standard the new warehouse sprinklers are installed to, the answer is still 13, not 25.

IBC 2021 — occupancy, construction type, and the pointer to NFPA 13

The International Building Code (2021) is study-only for Level I, but it is how most U.S. contracts choose a sprinkler standard. IBC Chapter 3 classifies occupancy groups. Chapter 6 classifies construction types (I–V). Chapter 9 then says whether sprinklers are required and which installation standard is permitted.

IBC 2021 §903.3.1 (Standards): sprinkler systems shall be designed and installed in accordance with §903.3.1.1 unless otherwise permitted by §§903.3.1.2 and 903.3.1.3 and other chapters. §903.3.1.1 (NFPA 13 sprinkler systems): where this code requires a building or portion to be equipped throughout with an automatic sprinkler system in accordance with that section, sprinklers shall be installed throughout in accordance with NFPA 13, except as provided in the IBC’s own exempt-location and bathroom paragraphs. §903.3.1.2 permits NFPA 13R only for Group R occupancies that meet the four-story / fire-department-access tests taught in Section 5.1. §903.3.1.3 permits NFPA 13D in one- and two-family dwellings, Group R-3, Group R-4 Condition 1, and townhouses.

Construction type does not secretly convert a warehouse into 13D. It changes height/area tables and sometimes whether sprinklers are required. When sprinklers are required for a non-residential occupancy, §903.3.1.1 still points to NFPA 13. Height/area increases that the IBC grants only for a 13 system are not available if the designer tries to substitute 13R.

NFPA 101 (2021), Life Safety Code, is also study-only. Some specifications cite 101 occupancy and egress instead of, or in addition to, IBC. At Level I, treat 101 as another adopted occupancy/life-safety code on the summary, not as a sprinkler layout manual.

NFPA 72 — fire-alarm interface only

Waterflow switches, control-valve tamper switches, and fire-pump running/trouble signals are commonly supervised by a fire alarm system. NFPA 72 is the fire-alarm code/standard used for that interface. Level I needs one sentence: the sprinkler system may report through a 72-compliant fire alarm; device placement, notification-appliance circuits, and fire-alarm programming are not a water-based layout chapter. If a stem is about candela or smoke-detector spacing, you are in the wrong program.

OSHA 1910 / 1926 — jobsite safety, not design standards

OSHA 29 CFR 1910 (general industry) and 1926 (construction) appear on the Level I study-only list because task 1.1.1 Obey jobsite safety requirements footnotes them (with NFPA 13 and 291). They govern trenches, lockout, PPE, and construction safety. They do not choose 13 versus 13R.

Identification table

Field scenarios at identification depth

Scenario A. Spec section 21 13 13 says NFPA 13 (2022). Civil drawings show a 6 in. ductile-iron lead-in, a post-indicator valve, and two private hydrants. You identify 13 for the tree and 24 for the yard. Hydrant flow-test procedure is 291.

Scenario B. Residual at 1,200 gpm is 18 psi; demand is 1,200 gpm at 50 psi. The summary lists a 1,500 gpm listed electric pump. You identify 20. You do not pick the impeller.

Scenario C. IBC occupancy Group S-1, Type II-B, sprinklers required throughout. §903.3.1.1 points to NFPA 13. 13R is not a shortcut for storage.

Scenario D. Closeout checklist asks for ITM frequencies after the owner takes the building. That handoff points to NFPA 25, while the as-built still cites the installation standard used to build the system.

If two companion standards could apply, list both on your question to the supervisor. Identifying 14 and 13 on a combined riser is correct; picking only one because the exam “likes a single letter” is how field RFIs get born.