V19

Drain-water heat recovery

Recover shower heat through a drain-stack heat exchanger without mixing waste and potable water.

Checked: 2026-08-22

VERT / GREEN

Check for an accessible vertical stack and simultaneous shower use.

JAUNE / YELLOW

Performance depends on model, orientation and plumbing; choose a tested unit and suitable configuration.

ROUGE / RED

Changes to potable/drain systems require plumbing/code compliance and cross-connection prevention.

Triage

Useful tools / data

  • Stack diameter/height
  • NRCan product list
  • Shower-use profile

What the professional checks

  • Select compliant configuration
  • Coordinate water/drain piping
  • Verify future access

Sources and limits

Triage helps prepare the project; it does not replace permits, calculations, inspections or regulated work.

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 →

Tools related to this issue

V14

Systems to check before closing the work

V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.

Renovation dependenciesPlumbing pressure and systemCode versions
V15

Remaining system checks not to miss

V15 covers issues that can block a project, cause a loss or become expensive once concealed.

Before closing wallsPrivate sewer/water servicePost-renovation commissioningCodes + climate by province
V16

Advanced diagnostics to cross-check

V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.

Drinking-water quality and treatmentRainwater and greywaterPyrite, pyrrhotite and ochre
V17

Specialized systems to cross-check

V17 completes gas, soil, water, fire, climate and structural interfaces.

Culvert and ditch
V18

Specialized diagnostics to verify

V18 connects systems that become costly or regulated when a primary project triggers them.

Low-slope roof
V27

Project risks and overlooked interfaces

V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.

Laundry room leak containment
V28

Finish and service details to verify

V28 connects small details that become costly once finishes are closed.

Plumbing cleanouts and service accessOutdoor faucet: freeze and backflow protection
V47

V47 interfaces not to miss

These details are small on a drawing but can control water, structure or durability.

Building trapCast-iron stack