Water heater: temperature/pressure relief and discharge

Verify the safety relief valve, discharge piping and system expansion remain functional and accessible after renovation.

VERT / GREEN = documenter/entretenir · JAUNE / YELLOW = mesurer/vérifier · ROUGE / RED = arrêter et faire valider.

Relief valve capped/blocked/isolated
Do not operate this way; have it corrected immediately by the required professional. Discharge piping altered/unknown
Verify material, route and termination per local code/manufacturer. Relief valve regularly drips
Diagnose pressure, thermal expansion, temperature or valve; never cap it. Valve accessible/documented
Keep model, date and manufacturer instructions.

What the professional checks

Verify relief valve, pressure, expansion and discharge
Confirm applicable local code compliance

Official sources

CNRC — Code national de plomberie 2025

Checked: 2026-08-22

Related path

Continue with the right tools

These links connect this page to the next useful checks and decisions without repeating the full content.

Start from a symptomOrganize plausible causes, observations, urgency and the right professional.Open →Track water useCompare meter readings and flag unusual changes.Open →Review water resilienceConnect flooding, drainage and future events to building adaptations.Open →Score home resiliencePrioritize water, outages, fire, climate, health and records.Open →Plan site, drainage and utilitiesCoordinate access, water, sewer, wells, septic, grading and site constraints.Open →

Explore: Systems to check before closing the work

Systems to check before closing the work

This section connects envelope, air, fire, structure, water and code instead of treating each project in isolation.

Renovation dependenciesPlumbing pressure and systemCode versions

Explore: Advanced diagnostics to cross-check

Advanced diagnostics to cross-check

This section connects water, soil, climate, safety, materials and seasonal use to existing projects.

Drinking-water quality and treatment

Explore: Specialized diagnostics to verify

Specialized diagnostics to verify

This section connects systems that become costly or regulated when a primary project triggers them.

Heat-pump water heater

Explore: Edge systems to integrate into the project

Edge systems to integrate into the project

This section covers interfaces that become important when multiple home systems interact.

Drain-water heat recovery

Explore: Often-overlooked service interfaces

Often-overlooked service interfaces

This section connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.

Domestic hot-water recirculationWater pressure, PRV and thermal expansion

Explore: Project risks and overlooked interfaces

Project risks and overlooked interfaces

This section connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.

Laundry room leak containment

Explore: Finish and service details to verify

Finish and service details to verify

This section connects small details that become costly once finishes are closed.

Outdoor faucet: freeze and backflow protection

Explore: Household safety and compliance details

Household safety and compliance details

This section connects smaller risks that often fall between finishes, appliances, plumbing and local code.

Mechanical room service access and clearances