Water heater replacement in Scarborough, Durham and the GTA
A water heater is one of the few appliances that fails wet, so most people replace theirs under pressure rather than on a plan. The decisions worth making — capacity, fuel, tank or tankless, where it vents — are easier made before the old one gives out. Metropolitan Heating and Air Conditioning has replaced water heaters across Scarborough, Durham Region and the GTA since 1979.
Call (416) 283-5698, weekdays 8:00 AM to 4:00 PM, to arrange an assessment.
When a tank is telling you it is finished
- Water seeping from the body of the tank. The lining has failed and the steel has perforated. There is no repair for that.
- Rusty hot water with a spent anode rod, which means corrosion has moved on to the tank itself.
- Rumbling or popping that persists after a flush, indicating sediment that has hardened onto the tank floor.
- Hot water running out sooner than it used to, from sediment eating into usable capacity or a failed dip tube.
- Repairs stacking up on a unit already near the end of its expected service life.
If you are not sure which you have, a repair visit will tell you — on a sound tank the repair is often the right answer.
Sizing is a flow question, not just a volume question
The number on the label is tank volume. The number that decides whether you run out is the first-hour rating: how much hot water the unit delivers in an hour, combining what is stored with what it reheats while you draw. A tank with a strong burner and quick recovery can out-perform a larger tank with a weak one.
Sizing starts from your real peak, not an average — the morning where showers, a dishwasher and a laundry load overlap. Fixture count and how the household's routines overlap both feed into it. Tankless is sized differently, on litres per minute at a given temperature rise: the colder the incoming water, the less flow the same unit supports — which matters through an Ontario winter.
Tank, tankless, or a heat pump water heater
A conventional tank stores hot water and reheats it on demand. Simple, good at simultaneous draws, and it loses some heat through the tank wall between uses.
Tankless heats water as it passes through a heat exchanger, so there is no standby loss, no tank to run empty, and far less space used. In exchange it needs a larger gas supply and its own venting, it has a minimum flow before it fires, and it needs descaling.
A heat pump water heater moves heat out of the surrounding air into the water rather than generating it with an element, so it uses markedly less electricity than a conventional electric tank. It needs enough air volume to draw from, it cools and dehumidifies the room it sits in, and it runs with some fan noise — so the location matters as much as the unit.
Venting, combustion air and gas supply
On the gas side, replacement is rarely a straight swap. A different efficiency tier usually means a different venting category, and a high-efficiency or tankless unit typically vents in plastic through a sidewall rather than into an existing chimney or B-vent.
That has a knock-on effect worth knowing: where a water heater and a furnace share a common vent, taking the water heater off it changes how the remaining appliance vents, and the chimney may then be oversized. The space also needs adequate combustion air. These details decide what a replacement actually involves, and we check them before quoting rather than on the day.
Pressure, expansion and the relief valve
Water expands as it heats. In an open system that expansion pushes back into the supply main; where a backflow preventer or pressure-reducing valve closes the system, it has nowhere to go and pressure rises with every heating cycle. That shows up as a relief valve that weeps, and it shortens the life of the tank.
The answer is a correctly sized and charged thermal expansion tank, a new temperature and pressure relief valve, and a discharge pipe run to a safe termination. Every installation also gets proper shut-offs and dielectric connections between dissimilar metals.
What the installation involves
The old unit is isolated, drained, removed and taken away. The new heater is set and connected, venting and combustion air arranged to the manufacturer's instructions, the gas or electrical supply connected and tested, expansion and relief provisions fitted, and the system filled and purged of air.
We then fire it, confirm the thermostat setting and delivered temperature, and check the venting draws correctly. Most manufacturer warranties require professional installation and documented servicing, so keep the paperwork. We show you the shut-offs, the relief valve and the drain, and explain what flushing or descaling your unit needs.
Arrange a replacement
Call (416) 283-5698 Monday to Friday, 8:00 AM to 4:00 PM, or send us your details. We price the options against your actual hot water demand rather than replacing like for like by default. Licensed and insured. Financing is available through Vista.