Garage drain and oil-water separator
Determine where a garage drain actually discharges and whether the use requires separation, treatment, authorization or no sanitary connection.
VERT / GREEN
Identify drain destination and actual garage use before changing anything.
JAUNE / YELLOW
Repair/maintenance shop is not the same as simple parking; requirements can change with use.
ROUGE / RED
Unknown discharge, hydrocarbon odour or drainage modification: do not discharge oil/solvents; check code and authority.
Quick triage
What the professional checks
The plumber/designer confirms destination, use, required separator, sizing, venting, service and environmental/local rules.
Official sources
Checked 2026-08-23
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 →
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V16
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V17
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V18
Specialized diagnostics to verify
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V19
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V27
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V28
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V34
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V47
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