At a glance
- Topic
- Reading the tank
- Reading time
- About 2 min
- Phone
- (365) 363-2754
- Matching repair
- Water Heater Repair in Ajax
Why it matters
A tank holds around 150 to 225 litres of hot water under pressure. When the steel finally rusts through, that water ends up on the basement floor, often under storage boxes or carpet. Planning the swap is cheaper than reacting to it.
The routine, in order
- Find the rating plate. It is a sticker on the tank side listing model and serial. Most makers hide the year and month inside the serial number; the manufacturer's website or our phone line can decode it.
- Look at the base. Rust streaks, a damp ring or white crust around the bottom seam are warnings.
- Listen when it heats. Popping and rumbling mean sediment layers on the bottom, which makes the tank work harder.
- Check the relief pipe. A pipe that drips or has drip marks deserves attention.
- Watch the water. Rusty hot water, with clear cold, points at the inside of the tank.
| Age of tank | Sensible approach |
|---|---|
| Under 8 years | Repair parts as they fail |
| 8 to 12 years | Repair small things; start planning |
| Over 12 years | Budget for replacement; act on any leak |
Mistakes to avoid
- Putting a finished room's flooring right up to the tank without a pan.
- Turning the thermostat way up to stretch hot water from a tired tank.
- Draining a fifteen-year tank for the first time ever; loosened sediment can stop the drain valve from closing.
Local tip Durham's lake water is moderately hard, so scale and sediment build faster here than in soft-water regions. An annual flush helps a young tank.
Where a plumber takes over
Any leak from the tank body, any gas smell, and any relief valve discharge that will not stop. Our repair page covers what we fix, and our replacement page covers the swap.
Questions we hear on the phone
Does a rented tank change this?
The rental company handles failure and replacement, but you still want a pan and to know the age.