How Old Is My Water Heater and Should I Replace It?
Look at the rating label on the side of the tank. The age is often coded in the first digits of the serial number. Most tank water heaters last around 8 to 12 years; past that, plan a replacement before it fails.
Request a plumberWhere is the label?
On the side of the tank, usually near the top or by the gas valve. It lists the model, serial number, size and fuel.
How do I read the serial number?
Codes vary by brand. Many start with the year and month. The maker's website can decode it, or include a photo of the label in your request.
What are the warning signs?
Rusty hot water, rumbling, moisture around the base, a tank that takes longer to recover, or a tank older than 10 years.
Why replace before winter?
Cold incoming water makes the heater work hardest in January. A tank that's near the end often fails when demand is highest.
Repair or replace?
On a younger tank, a thermostat, element, thermocouple or valve repair is often worthwhile. A leaking tank body can't be repaired.
What does the plumber need?
The label photo, where the heater is, gas or electric, and how many people live in the house. See water heaters.
What size do I need?
Think about how many people shower in the morning and whether you have a big tub. A plumber will size a new tank or tankless unit to your household rather than just matching the old one, which may have been too small all along. If the tank is close to ten years old, it is worth getting a replacement quote now, so you can plan the job instead of rushing it on a cold morning.
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