Map foundation drains, sump, storm and sanitary connections
Understand where every pipe goes before changing weeping tile, sump, backwater protection or a sewer branch.
VERT / GREEN
Create an actual map: source → pipe → pump/valve → discharge point.
JAUNE / YELLOW
Older homes or past work can have connections different from assumptions; inspection and municipal records may be needed.
ROUGE / RED
Connecting a foundation drain to the wrong system, bypassing backwater protection or discharging where water returns to the home/neighbour: stop and confirm topology and local rules.
Quick triage
What the professional checks
The plumber/drainage specialist combines camera/tracing, slope, municipal systems, sump, valves and surcharge risk into a reliable map.
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.
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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V14
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V15
Remaining system checks not to miss
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V16
Advanced diagnostics to cross-check
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V17
Specialized systems to cross-check
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V18
Specialized diagnostics to verify
V18 connects systems that become costly or regulated when a primary project triggers them.
V19
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V19 covers interfaces that become important when multiple home systems interact.
V27
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V28
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.
V32
Post-disaster and legacy systems
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
V33
Invisible constraints before work
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V34
Use, excavation and construction constraints
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V47
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.