VERT / GREEN
Measure static/dynamic pressure at different times before replacing fixtures or relief devices.
Water pressure, PRV and thermal expansion
Understand how a pressure-reducing valve, check valve and water heater can create a closed system where pressure rises during heating.
JAUNE / YELLOW
In a closed system, thermal expansion needs an appropriate accommodation method; the symptom is not always a bad water heater.
ROUGE / RED
Relief valve discharge, excessive pressure, corroded expansion tank or PRV work: professional.
Guided triage
Tools / data
- Water pressure gauge
- PRV/check-valve inventory
- Water-heater data
What the professional checks
- Confirm open/closed system
- Size expansion protection
- Verify relief valves/pressure
Official sources
Source check / vérification: 2026-08-22. Triage et planification seulement; les travaux réglementés restent aux professionnels requis.Related path
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