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Water heater repair and replacement in Toronto

Jackman Mechanical Ltd. repairs and replaces water heaters in Toronto homes, and in North York, Mississauga, Markham and Ajax: no hot water, not enough hot water, a leaking or noisy tank, or an old heater you want replaced. Gas tank, electric tank and tankless. A photo of the label on the tank tells us the model and size before anyone arrives.

What should I do if the water heater is leaking?

Water pooling around the tank is a call, not a form: (416) 888-1371, any hour. If water is spreading and you cannot stop it, close the main water valve. The City of Toronto says it is usually on the foundation wall where the water pipe enters the home, just before the water meter (City of Toronto).

If you smell gas near a gas water heater, leave. Enbridge Gas says to get out right away, leaving doors and windows open behind you if you can do it without delay, and to call 1-866-763-5427 or 911 once you are safely away (Enbridge Gas).

What will the request form ask about my water heater?

Four quick questions, all optional. They help us price it and bring the right parts.

Questions on the request form for water heater problems
QuestionThe choices
What kind?Gas tank · Electric tank · Tankless · Not sure
Owned or rented?Owned · Rented · Not sure
How old is it?Under 5 years · 5 to 10 years · Over 10 years · Not sure
What is it doing?No hot water · Not enough hot water · Leaking · Noisy · It works, I want a new one

Photos that help. The most useful are the label on the tank (it shows the model and size), the whole tank, and the pipes and vent on top.

The form asks whether the tank is owned or rented because a rented tank belongs to the rental company, not to you. If you are not sure, the monthly charge on a utility or rental bill is the usual clue.

What does a typical water heater installation look like?

Illustration of a gas tank water heater and its connections A tank water heater on the floor. Cold water comes down through a shutoff valve, with a red expansion tank on a tee. Hot water leaves the top. A vent rises from the top of the tank. A temperature and pressure relief valve on the side has a discharge line that runs down toward a floor drain. A tagged gas line comes down to the burner control through a shutoff valve, with a capped drip leg below the tee. TANKWATER HEATER GAS GAS COLD SHUTOFF EXPANSION TANK VENT RELIEF VALVE DISCHARGE LINE FLOOR DRAIN GAS SHUTOFF DRIP LEG HOTCOLD
Illustration of a typical installation, not a drawing of a specific job.

The drawing shows the parts we look at on every tank: the cold water shutoff, the expansion tank, the hot outlet, the vent, the temperature and pressure relief valve with its discharge line to a floor drain, and, on a gas tank, the gas shutoff and drip leg. When you send photos, those are the parts worth getting in the frame.

A tall water heater beside black gas piping with yellow tags, red expansion tanks and white vent pipes in a basement.
From a Jackman Mechanical job: a water heater beside its gas line and expansion tanks.

Which rules apply to a gas water heater in Ontario?

A gas water heater is a fuel-burning appliance, and three provincial rules follow from that.

  • Who may work on it. The TSSA, Ontario's fuels safety regulator, says maintenance of furnaces and fuel-fired appliances must be performed by TSSA-registered contractors, who must hire TSSA-certified gas technicians (TSSA). More in who can work on gas appliances.
  • A carbon monoxide alarm. The Government of Ontario says a home with a fuel-burning appliance needs one, beside each sleeping area and, since January 1, 2026, on every storey (Government of Ontario). See the carbon monoxide alarm guide.
  • A yearly inspection. The same page asks owners to have fuel-burning appliances, chimneys and vents cleaned and inspected by professionals every year.

Repair or replace?

That depends on the tank, its age and what failed, which is why the form asks how old it is and what it is doing. Jackman Mechanical prices each job directly with you; no prices are published on this site. If you already want a new heater, choose "A quote to replace or install" on the form.

Send it now, or call.

Emergencies go to the phone, any hour. For anything that can wait, send the details and photos and we reply by text or email.

Call Text Request