Fire Protection

How wet, dry, preaction and deluge sprinkler systems differ, and how to pick the right one for a freezer, a data hall or an aircraft hangar.

Sprinkler head types, temperature ratings, K-factors and response characteristics, and why only the heads near the fire open.

Hanging, bracing and joining sprinkler pipe: hangers, seismic bracing, grooved couplings and threaded joints, and safe overhead work from lifts.

Density/area method, friction loss and the calculation chain that proves a system delivers enough water, the core of the NICET Layout Level III hydraulics exam.

Standpipe classes and fire pump fundamentals: how NFPA 14 and NFPA 20 govern the systems that move water up tall buildings.

How NFPA 13 is organized and how to navigate occupancy hazard classifications, design criteria and installation rules without reading it cover to cover.

The hazards that actually hurt sprinkler fitters: overhead work from scissor lifts, open trenches for underground mains, and the OSHA rules that govern both.

Trenching, thrust blocks, hydrants and flushing: the buried piping that feeds every riser, and the cave-in protection rules that keep the trench from becoming the emergency.

Where the sprinkler system meets the fire alarm: waterflow and tamper switches, supervision, and the line where NFPA 13 hands off to NFPA 72 and the alarm trade.

Clean agent, CO2 and foam systems for the rooms where water is the wrong answer, and the separate NICET track that certifies this work.

What NFPA 25 requires of building owners and inspectors, and how inspection, testing and maintenance are three distinct activities with distinct rules.

The weekly-to-five-year inspection and test schedule of NFPA 25, and the records that prove a system has been kept ready.

What to do when a system is shut down: impairment tags, fire watches, notifications and restoring protection, per NFPA 25's impairment chapter.

The two tests inspectors run most: what a main drain test reveals about the water supply, how waterflow alarm tests work, and how to read the gauges honestly.

How the five-year UA sprinkler fitter apprenticeship works: paid on-the-job hours, classroom training and what BLS says about the trade's outlook.

NICET's two water-based tracks compared: the four-level Layout certification and the three-level Inspection and Testing certification, and which one your job actually needs.

Sprinkler licensing is state-fragmented: state fire marshals in some states, contractor boards in others, city buildings departments in a few. Three anchor examples show the patterns.

What it takes to run a sprinkler contracting firm: company registrations, responsible-managing-employee licenses and the credential a firm must keep on staff.

The three-level NICET ITWBS certification for inspectors: what each level lets you do, the 2025 exam updates, and the work history you need to document.

The four-level NICET certification for clean agent, CO2 and foam suppression work, with new exams arriving Fall 2026.

How Texas licenses sprinkler work through the State Fire Marshal's Office: the firm-level SCR registration and the RME-G, RME-I and RME-D individual licenses.