Quick takeaways
- Working sump pump with battery backup.
- Backwater valve on the sewer lateral.
- Downspouts extended 2+ metres from the foundation.
- Yard grading sloped away from the house.
- Window well covers on basement windows.
- Annual sump and drain inspection.
The hierarchy of flood prevention
If you only do one thing, make sure your sump pump works and has a battery backup. If you do two, add a backwater valve. If you do three, fix your downspouts and grading. Most Kanata floods we get called to could have been prevented at one of these three steps.
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