VERT / GREEN
Document boiler, radiators, vents and symptoms without altering safety controls.
Legacy steam heating and cast-iron radiators
Treat a low-pressure steam system as a complete system: boiler, pressure, vents, traps, pitch, condensate and radiators.
JAUNE / YELLOW
Hammering, uneven heating or a cold radiator can involve pressure, vents, pitch or condensate return.
ROUGE / RED
Steam leak, relief valve, boiler, fuel or piping alteration: qualified professional; do not improvise pressure settings.
System triage
What the professional checks
The heating specialist checks pressure, combustion where applicable, relief device, vents/traps, condensate return and boiler condition.
Official sources
Vérifié / checked: 2026-08-23
Related path
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V14
Systems to check before closing the work
V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.