What water heater replacement involves
We shut off gas or power and the cold supply, drain the old tank through its valve or a pump, and carry it out. The new heater goes on a level stand with a drip pan if there is finished space below or beside it. We reconnect water with new flexible or copper connectors, install a new temperature and pressure relief discharge pipe ending a short way above the floor, and, for gas units, check the venting and the gas connection for leaks.
- Typical sizes in North York houses: 40 or 50 US gallons for a family home, 60 for large households.
- Atmospheric vent tanks need a sound chimney liner or B-vent.
- Power-vent tanks need an outlet and can vent through a side wall.
- An expansion tank may be required when there is a check valve on the main.
Why North York houses need it
Many homes here still rent their heater, often installed in the same wave of replacements, and the tanks reach end of life within a few years of each other. Older bungalows in Flemingdon Park and Don Mills tuck the heater into a narrow closet, which limits the size and style that will fit. If you are weighing renting against buying, see our leaflet on the choice.
Plumber's tip: If your current tank is rented, call the rental company first. They own it and must be told before it is removed. Ask about their return process and any buyout terms.
How we write up the job
The order lists old and new models, capacity, fuel type, venting, the gas permit or notification needed, and the temperature setting we left. We also note the age of the shut-off valve on the cold line, because an old valve that will not close is worth replacing while the water is off.
Signs you should call
- Water around the base of the tank.
- Rusty-looking hot water at every tap.
- Rumbling or popping when it heats.
- Showers going cold far sooner than they used to.
For gas installations there are extra rules, covered on their own page. A burst pipe nearby can sometimes be confused with a leaking tank, so we check both.
Costs and what affects them
Capacity, fuel, venting changes and any code upgrades set the price. You get one figure that includes haul-away.
Job at a glance
| Category | Hot water |
|---|---|
| Tools | Hand truck, drain hose, gas leak detector, flex connectors |
| Final test | Draft check at the hood and soap test on every gas joint |
Tell-tale signs
- Rust in hot water only
- Tank weeping at the seam
- Unit well past its expected life
Steps on the job
- Shut off gas and water, drain the old tank
- Disconnect venting and supply and cart it out
- Set the new tank on a pan with new flex connectors and expansion tank
- Light, check draft and vent seal, and test the T&P
Your questions on this one
How long do tank water heaters last?
Roughly eight to twelve years, longer with regular flushing and soft water.
Can I install a bigger tank?
Often, if the venting and gas supply can handle it. We check before we quote.