Legacy plumbing: materials, transitions and history

Identify supply and drainage materials, transitions, repairs and concealed zones before a renovation opens walls.

VERT / GREEN

Photograph visible markings, valves, fittings and repairs without dismantling the system.

JAUNE / YELLOW

Kitec, polybutylene, galvanized steel, cast iron or mixed-generation assemblies require an assessment of actual condition and compatibility.

ROUGE / RED

Active leak, perforating corrosion, swollen/cracked fitting or unidentified concealed material before closing finishes: stop and obtain diagnosis.

Interactive triage

Helps choose the next step; it does not replace design, permits or professional diagnosis.

Unknown pipe or fitting
Identify the system and applicable standard before connecting new work. Visible corrosion/leak
Do not conceal the defect; determine extent and plan repair/replacement. Old-to-new transition
Verify transition fitting, support, expansion and material compatibility. Photos and shutoff record current
Keep material, size, location and intervention dates.

Useful tools and data

Photos of markings
Shutoff/riser map
Leak/repair history

What the professional checks

Identify materials and standards
Assess corrosion/degradation
Specify compatible transitions

Official sources

Checked 2026-08-22.

Related path

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