Plumbing FAQ — Toronto & the GTA

We're based in Thornhill, Ontario and serve Toronto, North York, Scarborough, Etobicoke, Vaughan, Markham, Richmond Hill, Mississauga, Brampton, Oakville and most of the Greater Toronto Area. If you're unsure, call and we'll confirm.

Yes. Demir Mechanical & Construction is a licensed, bonded, and fully insured contractor. All work is completed to Ontario code.

Yes — we provide free, upfront estimates for installations, renovations, and larger projects, so you know the cost before any work begins.

Yes. We're a locally owned and operated contractor based at 67 Conley Street in Thornhill, Ontario, serving Toronto and the Greater Toronto Area.

Our office is open Monday to Friday, 8:00 AM to 6:00 PM. Emergency plumbing service is available 24/7.

Yes. Plumbing emergencies don't wait for business hours, so our team is on call 24/7 across Toronto and the GTA for burst pipes, flooding, sewer backups, and no-hot-water situations. Call +1 (647) 919-3677 any time.

Shut off the main water valve (usually near where the water line enters the house), turn off the water heater if it's leaking, move valuables away from the water, and avoid using drains that are backing up.

In most GTA homes it's in the basement on the front wall, near the water meter. In condos it's usually in a closet or under the kitchen or bathroom sink. We can show you during any visit.

After-hours emergency calls may carry a different rate. We'll always tell you the cost before any work begins.

Yes — we provide free, upfront estimates for installations, renovations, and larger projects, so you know the cost before any work begins.

We assess the problem first and give you an upfront price before starting. No hidden fees and no surprises on the invoice.

Yes. We stand behind our workmanship — if something isn't right with work we completed, call us and we'll make it right.

We accept common payment methods including e-transfer, credit and debit. Details are confirmed with your quote.

For most homes, every 1–2 years is enough. Restaurants and buildings with heavy use may need cleaning every few months.

Most tank water heaters last 8–12 years; tankless units can last 20 years with proper maintenance. Rusty water, leaks or not enough hot water are signs it's time to replace.

Many Toronto homes benefit from a backwater valve, which helps prevent sewage backing up into the basement during heavy rain. We can assess your home and install one.

Yes. We install customer-supplied toilets, sinks and fixtures, and can also supply them for you.

Yes. We regularly handle riser renovations, mechanical room upgrades, and ongoing maintenance for multi-unit residential and commercial buildings, coordinating directly with property managers to minimize disruption to residents.

Risers are the vertical pipes that carry water and drainage between floors in multi-unit buildings. A riser renovation replaces aging risers to stop leaks, discoloured water and pressure problems.

Yes. Most of our building projects are completed while residents or tenants remain in place, with planned shut-offs and advance notices.