Short answer
A commercial gas engineer needs calibrated pressure gauges (U-gauge and electronic), a flue gas analyser, a combustible gas detector, purge hoses and fittings, a leak detection solution, pipe cutting, threading and press-fit tools, and appliance service tools — plus safety kit such as fire extinguishers and warning notices.
Test and measurement
Electronic manometer, water gauge, flue gas analyser, gas detector, CO and CO₂ monitors for room testing, multimeter, and temperature probes.
Pipework tools
Pipe threaders, press-fit tools, cutters, stilsons, flange tools and purge equipment sized for commercial pipework.
Safety and records
Fire extinguisher, no-smoking signs, barrier tape, warning labels, and a means of recording test results and certificates.
Figures are typical for UK natural gas. The current edition of the relevant IGEM standard and the manufacturer's instructions always take precedence on site.
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