The fire protection glossary

Name: West Coast Fire Systems
Address: Long Beach, CA, US
Telephone: +17144658801

Every industry term your vendor should have explained already — defined in plain English, California context included.

Reference · 20 terms

ITM (Inspection, Testing & Maintenance): ITM stands for inspection, testing, and maintenance — the recurring work that keeps a fire protection system functional and code-compliant after it is installed. NFPA standards such as NFPA 25 (water-based systems) and NFPA 72 (fire alarms) set the frequencies, ranging from weekly gauge checks to 5-year internal pipe assessments. In California, Title 19 of the Code of Regulations makes many of those frequencies a legal obligation of the building owner, not a recommendation.
AHJ (Authority Having Jurisdiction): The AHJ, or authority having jurisdiction, is the official or agency with legal authority to enforce fire code requirements on a given property — usually the local fire department’s fire prevention bureau. In Southern California that may be a city department such as Long Beach Fire or LAFD, a county agency such as Los Angeles County Fire, or the State Fire Marshal for state-owned buildings. When a code says “where required by the AHJ,” that official’s interpretation is what governs your building.
NFPA 25: NFPA 25 is the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, covering sprinklers, standpipes, fire pumps, and private fire service mains. It sets the ITM calendar for those systems, from weekly and monthly checks through annual tests and 5-year internal assessments. California adopts NFPA 25 with state amendments through Title 19, so its schedules carry regulatory force statewide.
NFPA 72: NFPA 72 is the National Fire Alarm and Signaling Code, governing the design, installation, performance, testing, and maintenance of fire alarm and emergency communication systems. Its ITM chapter requires periodic testing of initiating devices such as smoke detectors, pull stations, and waterflow switches — most on an annual cycle — plus verification of smoke detector sensitivity on a defined schedule. Alarm test records are among the first documents an AHJ or insurer asks a commercial building to produce.
NFPA 10: NFPA 10 is the Standard for Portable Fire Extinguishers, covering their selection, placement, inspection, and maintenance. It calls for monthly visual inspections, annual maintenance by a trained person, a six-year internal examination for stored-pressure extinguishers, and hydrostatic testing of the cylinder — every 12 years for most dry chemical units and every 5 years for CO2 and water types. The dated service tag on each extinguisher is the compliance record a fire inspector checks first.
NFPA 80: NFPA 80 is the Standard for Fire Doors and Other Opening Protectives, governing fire-rated door assemblies, frames, hardware, and rolling steel fire doors. It requires annual inspection and testing of fire door assemblies — including drop tests of rolling fire doors — with written records kept for the AHJ. Propped-open or field-modified fire doors are among the most common citations in commercial building inspections.
NFPA 101: NFPA 101 is the Life Safety Code, which addresses how a building protects its occupants during a fire: exit paths and capacity, door hardware, emergency lighting, and occupancy-specific requirements. Its practical footprint for a property manager includes monthly 30-second and annual 90-minute emergency lighting tests and keeping the means of egress unobstructed. California enforces life safety primarily through the California Building and Fire Codes, but NFPA 101 governs directly in federal and healthcare (CMS) contexts and appears in insurer requirements.
California Title 19: Title 19 of the California Code of Regulations is the State Fire Marshal’s body of public safety regulations that makes fire protection system ITM a legal obligation for California building owners. Sections 901 through 906 adopt NFPA 25 frequencies with California amendments and require that test records be documented and retained for the AHJ. It is why California proposals and inspection notices refer to a “Title 19 test” and the “5-year cert.”
LAFD Regulation 4 (Reg 4): Regulation 4, or Reg 4, is the Los Angeles Fire Department’s Chief’s Regulation requiring fire protection systems and equipment in City of Los Angeles buildings to be tested by LAFD-certified Reg 4 testers, with results filed with the department. Most covered equipment is tested annually, sprinkler and standpipe systems on a five-year Reg 4 cycle, and results are submitted electronically through LAFD’s compliance system; defects must be corrected within 30 days of the test. Reg 4 applies only inside LA City limits — Long Beach, county areas, and other cities run their own AHJ programs.
5-Year Certification (5-Year Cert): The 5-year certification, or 5-year cert, is California’s Title 19 requirement for the major round of service and testing that water-based fire protection systems must receive every five years. For sprinkler systems it includes an internal pipe condition assessment and component testing; for standpipes it includes a flow test at the hydraulically most remote outlet and, for manual and dry systems, a hydrostatic test. It is the most involved and most expensive event in the ITM cycle, so it belongs in the capital and maintenance budget ahead of time.
FDC (Fire Department Connection): A fire department connection (FDC) is the inlet fitting — often a two-port “siamese” on the building exterior — through which a fire engine pumps water into the sprinkler or standpipe system to boost pressure during a fire. NFPA 25 requires quarterly inspection of FDCs for missing caps, obstructed or damaged threads, and stuck check valves. An FDC that is blocked by landscaping, parking, or paint is a routine fire inspection citation because it delays fire department water supply.
Churn Test: A churn test is a no-flow run of a fire pump that confirms the pump starts and operates at rated speed and pressure without discharging water. Under NFPA 25, diesel-driven pumps are run weekly for at least 30 minutes and electric pumps at least monthly for 10 minutes, with weekly runs required in certain higher-risk configurations. Churn test logs are core evidence in the ITM record an AHJ or insurer reviews.
Flow Test: A flow test measures whether a water-based fire protection system can actually deliver its designed flow and pressure, rather than just hold pressure at rest. The best-known example is the annual fire pump flow test under NFPA 25, run at churn, 100 percent, and 150 percent of rated capacity; main drain tests and the 5-year standpipe flow test are others. A pump can pass its weekly churn test and still fail its annual flow test, which is why flow testing is the real proof of capacity.
Hydrostatic Test: A hydrostatic test pressurizes piping with water — typically to 200 psi, or 50 psi above maximum system pressure, held for two hours — to prove the piping holds pressure without leaking. NFPA 25 requires it at five-year intervals for manual and dry standpipe systems, and it is also part of acceptance testing for new installations. The same term describes the cylinder integrity test portable extinguishers receive under NFPA 10.
Fire Watch: A fire watch is one or more trained people assigned to continuously patrol a building, watch for fire, and notify the fire department while a required fire protection system is out of service. The California Fire Code (Section 901.7) authorizes the fire code official to require it during impairments — commonly when a sprinkler system is down for more than 10 hours in a 24-hour period, or a fire alarm system for more than 4 hours. The cost falls on the building owner, which is a strong argument for scheduling repairs so systems are restored the same day.
Impairment: An impairment is any condition that takes a fire protection system, or part of one, out of normal service — a closed control valve, a drained standpipe, or a fire pump awaiting parts. NFPA 25 Chapter 15 distinguishes preplanned from emergency impairments and requires tagging the impaired equipment, notifying the AHJ, building occupants, and the insurance carrier, and putting mitigation such as a fire watch in place until service is restored. Documented impairment handling is a standard item in insurer property reviews.
Backflow Prevention Assembly: A backflow prevention assembly is a set of check valves on the fire service line that stops stagnant water in the fire protection system from flowing backward into the drinking water supply. Fire lines commonly use a double check detector assembly (DCDA) or, where the health hazard is higher, a reduced pressure principle assembly. It requires annual testing by a certified backflow tester under the water purveyor’s cross-connection program, plus an annual forward-flow test under NFPA 25 to confirm it does not restrict fire flow.
Standpipe Classes (Class I, II, III): Standpipe systems are grouped into three classes by who the hose connections are designed for: Class I provides 2.5-inch outlets for fire department use, Class II provides 1.5-inch hose stations for occupant use, and Class III provides both. Class I is the most common in commercial mid-rises, high-rises, and parking structures, where firefighters connect their own hose at each floor. The class determines the ITM scope, including the Title 19 5-year flow test and hydrostatic testing of dry and manual systems.
CSLB C-16 License: The C-16 Fire Protection Contractor license is the California Contractors State License Board classification for contractors who fabricate, install, test, maintain, and repair fire protection systems in the state. Fire alarm installation is typically performed under a C-10 electrical classification, so a full-scope vendor may hold more than one license. Any license number a vendor quotes can be checked in seconds through the CSLB’s public license lookup — do that before signing a service agreement.
NICET: NICET is the National Institute for Certification in Engineering Technologies, which certifies individual technicians at Levels I through IV in fire protection disciplines such as water-based systems layout, inspection and testing of water-based systems, and fire alarm systems. Certification is earned per person, not per company, through exams and documented work experience. Some AHJs and project specifications require NICET-certified personnel for design or testing work, so asking for a technician’s NICET level and discipline is a quick competence check.

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