Basement flooding and sewer backup pros
Plumbers for backwater valves, sump pumps and drains.
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Plumbers and drainage contractors who fit backwater valves, sump pits and pumps, battery backups and French drains to keep water out of a basement. Choose your city to see the pros.
Before you hire
Ask which permits the job needs and who will get them; your municipal building department can tell you before work starts.
Get written quotes from at least three contractors for the same work, and check references from recent clients.
Put it in a written contract: the work, price, deposit, start and finish dates, warranty, permits and clean-up. Paying cash to skip it leaves you no recourse.
Still choosing the equipment?
Compare prices and specs before you call a pro.
Guides
Read up before you call.
Best-of
The best battery backup sump pumps
Four backup sump pumps compared on the makers' own figures: flow at 10 ft, run time per battery, pit size and alarms that work offline.
Comparison
Battery vs water-powered backup sump pumps
Battery backups pump harder and work in any home; water-powered ones run through long outages but need city pressure, a backflow preventer and your town's approval.
Explainer
Backwater valves around Montréal: rules and subsidies
What Montréal, Laval, Longueuil and Pointe-Claire require for backwater valves, and what RénoPlex and PC-3002 pay towards them.