Backwater valve installation
A backwater valve blocks sewer backup before it reaches your basement during a heavy rain.
Ahuntsic-Cartierville, Saint-Léonard…
Sewer backup and flooded basement: drain plumber in Montreal
Backwater valves, camera drain inspection, root intrusion in the lateral and sump pumps. A referral service for the post-war neighbourhoods of Ahuntsic-Cartierville, Saint-Léonard, Montréal-Nord and Rivière-des-Prairies.
- Free initial assessment and quote, no obligation
- Priority given to active backups and flooded-basement emergencies
- Clear explanation of options and costs before work begins
- Connected with a plumber who knows the drains and sewers in your area
All services
Camera inspection and drain cleaning
A camera in the drain shows exactly where it's blocked — root, sag, debris — before anything gets dug up.
Root intrusion in the lateral drain
Roots from a mature maple or elm find the joints of an old clay drain and eventually block it outright.
Sump pump and basement water damage
A working sump pump moves groundwater out before it gets in — and a backup pump keeps running if the power drops during the storm.
A flooded basement is never an accident
In neighbourhoods built between 1945 and 1970 — Ahuntsic, Saint-Léonard, Montréal-Nord, part of Rivière-des-Prairies — the sewer network is often combined: stormwater and wastewater share the same pipe. During a heavy rain, the municipal system can fill faster than it drains, and water backs up through the lowest point in the house, usually the basement floor drain or the toilet.
The lateral connecting the house to the municipal sewer has aged too: clay pipe laid in sections, joints that open up over time, roots from mature trees finding their way to the moisture. A recurring slow drain or backup is worth a camera inspection before it becomes a flood.
We connect homeowners in Ahuntsic-Cartierville, Saint-Léonard, Montréal-Nord and Rivière-des-Prairies–Pointe-aux-Trembles with a plumber who handles these drain and backup jobs every day, in French and English.
Indicative ranges
Drain and sewer backup price guide: Montreal (2026)
- $250 – $450Camera inspection with video report
- $300 – $650Drain cleaning (auger or light hydro-jet)
- $1,800 – $3,500Backwater valve installation
Indicative prices before tax, based on typical residential jobs in the Montreal area. Every quote follows an inspection. Drain and sewer backup price guide: Montreal (2026).
Areas we serve
We serve Ahuntsic-Cartierville, Saint-Léonard, Montréal-Nord and Rivière-des-Prairies.
Guides
The backwater valve: how it works and when to install one
What a backwater valve does, the signs it's time to install one, and what to know about maintenance and financial assistance.
After a basement backup: what to document before you clean up
What to do in the first few hours, what an insurer generally asks for, and how to avoid it happening again.
Free assessment of your drain problem, fast reply.
Free written quote. We call back the same business day.