Homeowner guideTank age
How Many Years a Water Heater Gives You
Most tank water heaters last 10 to 15 years. Knowing your heater age and the warning signs helps you replace it on your schedule, not in an emergency.
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- Short steps a homeowner can follow safely
- What to check before you pick up the phone
- Clear signs it is time to call a plumber
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The short version
- Rusty hot water.
- Rumbling or popping sounds.
- Water around the base.
- Hot water running out faster.
- Rust on the tank or fittings.
Find the age
Find the rating label fixed to the heater jacket. The manufacture date is often coded in the serial number, usually as a month and year. Manufacturers publish how to read their codes; a quick search of the brand name and "serial number date" will usually show you.
Typical lifespans
| Type | Typical life |
|---|---|
| Gas tank | About 10 to 13 years |
| Electric tank | About 10 to 15 years |
| Tankless | About 15 to 20 years with maintenance |
Hard water, high pressure, heavy use and no maintenance shorten these.
Extending its life
- Flush the tank once a year to remove sediment.
- Check the anode rod every few years and replace it if worn.
- Keep pressure in a safe range with a PRV and expansion tank.
- Set the temperature at about 49 to 60 degrees Celsius, balancing safety and bacteria control.
From the van: A tank in a finished basement should sit in a drain pan. When it does fail, the pan buys you time.
Plan ahead
When your heater nears ten years, start planning. Decide on size, type and whether to rent or own. Replacing before failure avoids flooding and lets you choose the best option.