Tornado Plumbing & Drains in Markham, Ontario
Markham plumber for older Unionville homes, new builds, flood protection, and drains
Markham spans heritage Unionville laterals, 1970s-80s Thornhill and Milliken stock, and street after street of 2000s-2010s builds in Cornell, Wismer, and Berczy - plus one of the GTA's most proactive municipal flood-control rebate programs. Use this Markham page to move from that local context into the right next service or guide quickly.
Local plumbing challenges in Markham
Unionville and Markham Village hold the city's oldest housing — heritage and early-1900s homes plus 1960s-1980s infill, with clay laterals, cast-iron stacks, and mature tree cover. Root intrusion and aging-drain diagnostics here look much like older Toronto work.
Thornhill's Markham side and Milliken carry 1970s-1980s stock where original laterals, sump pumps, and water heaters are all reaching end of life around the same time — a coordinated replacement cycle rather than one-off failures.
Cornell, Berczy, Wismer, Greensborough, and Box Grove are the new Markham: sound piping, but builder-grade tanks, sump pumps, and fixtures from the 2000s-2010s waves are hitting their first replacement age, and Kitec-era piping still appears in the earlier part of that band.
Markham has been one of the GTA's most proactive municipalities on basement flooding, running a dedicated stormwater-fee-funded Flood Control Program and the Private Plumbing Protection Rebate Program — up to $1,750 for an indoor backwater valve, $2,000 outdoor, up to $5,000 for weeping-tile disconnection with a sump pump, and up to $2,500 for lateral relining. The City must pre-approve the rebate application before work begins — we sequence the job around that.
York Region's water is moderately hard, so tankless descaling is worth scheduling here. We dispatch to Markham from our Etobicoke headquarters at 45 Chauncey Ave — typically 35-45 minutes via the 407 outside rush hour, and same-day emergency response is realistic for most of the city.
Neighbourhoods We Serve in Markham
Plumbing & Drain Services We Provide Across Markham
Drain Cleaning Markham
Two very different drain problems share one postal code here. In Unionville and Old Markham Village, 19th-century houses off Main Street still drain through clay laterals that the mature silver maples along Bruce Creek and the Rouge have spent decades rooting into. In Milliken Mills, Armadale and Middlefield, the 1970s-80s stock sits on ageing cast iron that scales and narrows until the kitchen stack backs up. We cable, cut and flush from the cleanout, then confirm the line runs clear. Drain cleaning starts at $145; where roots or grease have coated a long lateral, hydro jetting runs $400-$1,400. Note that Markham's rebate program does not cover routine cleaning - only the protective work below.
See drain cleaning pricingBackwater Valve Installation Markham
Markham runs the most generous protective-plumbing rebate in the GTA, and the backwater valve is where most homeowners start: $1,750 back on an indoor valve, $2,000 on an outdoor chamber. The catch is sequence - the City must pre-approve the work before a wrench is turned, and the Technical Review needs a licensed plumber's CCTV record of your lateral first (camera inspection from $180). Older Unionville, Thornhill and Milliken Mills houses on flat lots below street grade benefit most, as do Cornell and Greensborough basements on the Little Rouge side. Installation starts at $1,440. Permits must be pulled by April 30, 2027 and applications filed by July 31, 2027.
Book a backwater valve assessmentTrenchless Sewer Repair Markham
Markham is the rare GTA municipality that puts real money behind lining a private lateral - up to $2,500 toward a sanitary or storm lateral reline or repair. That matters most where digging is worst: under the brick sidewalks and heritage front gardens of Main Street Unionville, beneath the mature-tree boulevards of Old Markham Village, and across the interlock driveways of Royal Orchard and Grandview, where 1960s-70s clay has shifted at the joints. Cured-in-place lining rebuilds the pipe from the inside through one access point, from $2,400. As with every Markham rebate item, the City must pre-approve the scope and review a camera inspection of the lateral before your permit is issued.
Explore trenchless CIPP liningSump Pump Installation Markham
The biggest cheque in Markham's program goes to getting your weeping tile off the sewer: $3,000 to disconnect it, or $5,000 when the disconnect is paired with a new sump pump and pit. That is aimed squarely at the pre-1980s stock - Royal Orchard, German Mills, Milliken Mills, Armadale - where foundation drains were plumbed straight into the municipal line and every heavy Rouge-watershed storm pushes water back toward the basement. Newer Wismer Commons, Berczy Village and Cornell homes usually have a pit already, but often a builder-grade pump that quits under load. Installations start at $720, with battery backup available for outages. City pre-approval and a permit are required before any of it qualifies.
Get a sump pump quoteEmergency Plumber Markham
Markham's 1995-2007 building boom - Cornell, Wismer Commons, Berczy Village, Greensborough, Cathedraltown, Angus Glen, Box Grove - lands squarely in the years Kitec supply piping was sold, and the fittings let go without warning. It is not a recall, but insurers ask about it and may raise deductibles or restrict coverage. We handle burst supply lines from $360 and after-hours calls, including sewage backups, from $225, with crews routed up the 404 and 407 to Thornhill, Markham Centre, Unionville and Cornell. Emergency dispatch runs 24 hours Monday through Saturday. Rated 4.9 on Google across 191+ reviews and 5.0 on HomeStars. Emergency repairs are not rebate-eligible - the City funds prevention, not cleanup.
Call for emergency serviceWhere we work in Markham
We serve the full city of Markham — Thornhill and Milliken in the west, Unionville and Markham Village in the centre, and Cornell, Wismer, Berczy, and Box Grove in the newer east and north.
Drain and sewer diagnostics for Unionville and Markham Village's older laterals
Backwater valve and sump installs aligned with Markham's flood-control program requirements
Equipment replacement cycles in Cornell, Berczy, Wismer, and the newer subdivisions
Common starting points in Markham
Markham pricing usually depends on whether the house is a heritage or post-war property with original buried drains, or a newer build where the work is equipment replacement and flood protection.
Backwater valve installation
$2,800
Mainline normally-open valve with permit and inspection. Markham's Private Plumbing Protection Rebate covers up to $1,750 (indoor) or $2,000 (outdoor) on pre-approved installs — the City must approve the application before work begins, and we confirm the net before quoting.
Camera inspection
$250
Recorded video and PACP-coded report. $500–$900 with sonde locate. The right first step on Unionville and Markham Village laterals with any backup history.
Drain cleaning
$189
Single-fixture snake $189–$350; main-line snake $350–$650. Camera-after-clean adds about $250 — recommended on the older central neighbourhoods' clay lines.
What usually changes the price in Markham
- Housing age band: heritage Unionville laterals versus 2000s Cornell builds are entirely different scopes
- Mature tree cover and clay coupling joints in the older central neighbourhoods
- Whether a flood-protection install is being aligned with Markham's rebate program paperwork
- Kitec-era supply piping in mid-1990s to 2007 builds
Markham's Private Plumbing Protection Rebate Program covers up to $1,750 for an indoor backwater valve ($2,000 outdoor), up to $5,000 for weeping-tile disconnection with a sump pump, and up to $2,500 for lateral relining — but the City must pre-approve the application before any work begins. We handle that sequencing and the paperwork. See rebate guide
Why Burlington pages should feel more premium than a generic suburb template
- Burlington blends lake-adjacent housing, mature subdivisions, and newer builds, so one-size-fits-all recommendations are rarely useful.
- Hot-water reliability, sump planning, and sewer diagnostics often overlap here, especially in homes aging into their first major replacement cycle.
- The page structure should make it easy to move from local context into the exact service, guide, or inspection path that fits the house.
If you are deciding between repair and replacement, include the age of the equipment or line if you know it.
Popular plumbing services in Markham
Start with the category that best matches the problem, then move into the service or guide that fits your property type, urgency, and what is actually happening on site.
Related Guides
Browse all service categories
Emergency Plumbing
View all emergency plumbingDrain & Sewer Services
Basement Waterproofing & Flood Prevention
View all basement waterproofing & flood preventionWater Lines & Service Upgrades
View all water lines & service upgradesWhat Markham customers say
4.9 from 320+ reviews
5.0 from 400+ reviews
Best of 2019-2025
"Our Unionville home's original clay line kept backing up. Tornado's camera found the root intrusion, and they repaired the failed sections without digging up the whole yard."
- Unionville homeowner (Google)
"Backwater valve and sump install handled end to end, including the permit and the rebate paperwork for the city program."
- Markham homeowner (Google)
"The builder-grade water heater in our Cornell home failed at year 14. Same-week replacement, clear pricing, and they flagged two valves worth replacing while the water was off."
- Cornell homeowner (HomeStars)
Recent plumbing work in Markham
These project photos show the kind of plumbing and drain work we handle in and around this area.
Basement floor opened to replace the under-slab drain lines
Interior drain re-piping, August 2026. The slab was cut along the drain route, the old lines removed, and new PVC drain connections laid on gravel with stub-ups for the fixtures above.
Bedding the new basement drain run in gravel
Same August 2026 basement drain project: each fitting is supported and the run is bedded in clear gravel before restoration, so the slope set during installation does not move.
Finished connection: new PVC lateral, shielded couplings and cleanout stub before backfill
Completed connection on the August 2026 lateral replacement: the new pipe meets the existing line on shielded couplings, with a cleanout stub left accessible at grade.
More customer stories from Markham-area jobs
These stories give you a better feel for how the work went, how the team communicated, and what people appreciated after the job was done.
Iljona
February 2026“Our kitchen sink had a blockage and terrible odour. I called to book an appointment and they were able to see it the next day. They were very professional and got there early the day of. The problem was solved in under an hour and the service was great. Very recommended and I’ll definitely continue to book with them!”
Ivo Mandadjiev
December 2020“Mike and Troy from Tornado plumbing were exceptional - great communication, very responsive action and exemplary service including thoughtful responses to all of our questions. Provided straightforward advice on the next steps. Much recommended.”
Jeremy Fingold
March 2021“Very hard working crew! Came to replace the lead water supply pipe with copper using the trenchless torpedo method. Unfortunately, my ground was very hard clay, and it took a little longer than they had anticipated to get the torpedo going in the right direction. But they got the job done, and stuck to their quote, which shows integrity.”
320+ Google reviews. HomeStars Best of 2019-2025. BBB Accredited.
Markham plumbing FAQ
Do you serve all of Markham?
Yes — Thornhill, Milliken, Unionville, Markham Village, Cornell, Berczy, Wismer, Greensborough, and Box Grove. We dispatch from our Etobicoke headquarters, typically 35–45 minutes via the 407 outside rush hour.
Does Markham have a basement flooding rebate?
Yes — Markham's Private Plumbing Protection Rebate Program covers up to $1,750 for an indoor backwater valve ($2,000 outdoor), up to $5,000 for weeping-tile disconnection combined with a sump pump, and up to $2,500 for sanitary or storm lateral relining. The catch: the City must pre-approve your application before work begins, the home generally must be built before 1985 or have demonstrated flood risk, and the rebate is one-time per property (current deadlines: building permit by April 30, 2027, application by July 31, 2027). We handle the approval sequencing and documentation.
What goes wrong most often in Markham homes?
In Unionville, Markham Village, and Thornhill: root intrusion and aging clay or cast-iron drains. In Cornell, Berczy, and the newer subdivisions: builder-grade water heaters, sump pumps, and fixtures reaching first replacement age.
Do you work on heritage homes in Unionville?
Yes. Heritage-area work needs careful access planning and non-destructive diagnostics first — camera inspection and targeted repair rather than default excavation.
Need a plumber in Markham?
If a backup is active, call right away. For flood-protection installs, rebate-aligned work, or equipment replacement, book online and include photos plus the home's approximate build year — it changes the plan more in Markham than almost anywhere else we serve.