Foundation drain: know where it connects before altering it

Homes may have different historical arrangements between foundation drain, sump, sanitary, storm or combined sewer. Map the actual destination before work.

Decision triage

VERT / GREEN · JAUNE / YELLOW · ROUGE / RED

Drain destination unknown Historical sanitary connection suspected Project changes several drainage networks Networks identified and mapped

What the professional checks

The specialist checks camera/tracing, elevations, sanitary/storm/combined connections, valves, sump, public/private responsibility and local rules.

Official sources

Sources checked: 2026-08-24

Related path

Continue with the right tools

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

Plan a complete construction projectConnect feasibility, design, permits, concealed work, commissioning and closeout.Open →Check permit triggersPrepare the questions and documents to confirm with the local authority.Open →Check a contractorDocument licence, insurance, scope, payments, changes and warranties.Open →Update a construction costEscalate a historical cost using comparable index values.Open →Prepare pre-delivery reviewRecord documents, enclosure, systems, finishes and deficiencies before closeout.Open →

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