ITM & Inspections

NFPA 25 — ITM of Water-Based Fire Protection

Complete reference for NFPA 25 inspection, testing, and maintenance frequencies across all water-based fire protection systems

NFPA 25 ITM Frequency Table (Interactive Tool)

Searchable, filterable table of every NFPA 25 inspection, testing, and maintenance requirement — sort by frequency, component, or task

Wet Sprinkler System — The Standard of Protection

Full NFPA 25 maintenance schedule from weekly gauge checks to 5-year internal pipe inspection

Dry Sprinkler System — Complete Guide

Low-point drain checks, annual trip test, air compressor maintenance per NFPA 25

Pre-Action Sprinkler System — The Double Interlock

Quarterly alarm test, annual partial-flow trip test, 3-year full-flow trip test per NFPA 25 §13.4.3

Deluge Sprinkler System — All Sprinklers, All at Once

Annual trip test, full-flow tests every 3 years per NFPA 25 §13.4.3

Sprinkler Heads — The First Responders

Quarterly visual inspection, 20-year replacement testing, spare head requirements per NFPA 25 §5

Fire Pump — The Heart of the System

Weekly churn test, annual flow test at churn/100%/150%, diesel run requirements per NFPA 25 §8

Jockey Pump — The Pressure Maintainer

Start frequency observation during weekly churn and annual flow tests, cycling indicators per NFPA 25 §8

Jockey Pump Controller

Start/stop set-point verification, cycling observation, and troubleshooting per NFPA 20 §4.26

Control Valve — The Authority

Weekly position verification, annual exercise, tamper switch supervision per NFPA 25 §13.1

Post Indicator Valve (PIV)

Monthly inspection, semiannual tamper switch test, annual operation per NFPA 25 §13.3

Waterflow Switch — The First Alert

Quarterly alarm test via inspector's test station, retard timing verification per NFPA 25 §5.3.3

Tamper Switch — The Watchdog

Quarterly supervisory signal test, valve position verification per NFPA 25 §13.1

Pressure Switch — The Trigger

Quarterly testing via inspector's test or valve operation; pump start, alarm, and supervisory switch verification per NFPA 25

Inspector's Test Station — Simulating the Emergency

Quarterly waterflow alarm test procedure, dry system trip time recording per NFPA 25 §5.3.3

Alarm Check Valve — The Heart of the Wet Riser

Quarterly alarm test via inspector's test station, retard chamber inspection, trim valve operation per NFPA 25 §13.3

Dry Pipe Valve

Annual trip test, priming water level check, 5-year internal inspection per NFPA 25 §13.4

Check Valve

5-year internal inspection of clapper, seat, and hinge per NFPA 25 §13.4.2

Backflow Preventer

Annual forward flow and backpressure test, 5-year internal inspection per NFPA 25 §13.6

Fire Department Connection — The Lifeline

Quarterly visual inspection, 5-year internal check valve inspection per NFPA 25 §13.8

Water Motor Gong

Quarterly mechanical alarm test concurrent with waterflow switch test per NFPA 25 §5.3.3.2

Air Compressor — The Lungs of the Dry System

Weekly/monthly gauge inspections, supervisory pressure maintenance, annual trip test verification per NFPA 25

Sprinkler System Controller (FACU)

Semiannual tamper switch test, annual waterflow alarm test, battery testing per NFPA 25/72

Pressure Gauges

Weekly (dry) and monthly (wet) gauge inspection, 5-year replacement or recalibration per NFPA 25 §5.2.4

System Drains & Drum Drips

Annual main drain test procedure, auxiliary drain maintenance on dry systems per NFPA 25 §13.2.5

Test Header — The Flow Test Manifold

Annual fire pump flow testing procedure, Pitot tube readings, acceptance curve plotting per NFPA 25 §8.3

Hose Connections & Standpipes

Quarterly inspection, annual operation, 5-year flow testing per NFPA 25 §6

Piping

Annual visual inspection of hangers and braces, 5-year obstruction investigation per NFPA 25 §14

Spare Sprinkler Cabinet

Annual inspection of spare sprinkler stock and wrench per NFPA 25 §5.2.1.3, §5.4.1.5

Fire Doors (NFPA 80)

13-point annual inspection checklist — self-closing, latching, labeling, clearances per NFPA 80 §5.2

Portable Fire Extinguishers (NFPA 10)

Monthly visual, annual service, 6-year internal inspection, 12-year hydrostatic test per NFPA 10

Kitchen Hood Suppression (NFPA 96)

Daily visual checks, semiannual professional service, fusible link replacement per NFPA 96 §11

Fire & Smoke Dampers

Annual operational test, fusible link inspection, accessibility verification per NFPA 80