How Old Is My Hot Water Tank?

Find the label

Look on the side of the tank for the manufacturer's label, often near the top or beside the gas valve. In a tight utility room, a phone camera helps read it.

Decode the serial number

Most manufacturers build the month and year into the serial number. The brand's website or customer service line explains how to read it.

What the age means

Many tanks last around 8 to 12 years. Past ten, start watching closely and budgeting for a replacement.

Signs of trouble

Rusty hot water, rumbling or popping sounds, water pooling around the base, a dripping relief valve, or hot water running out faster than it used to.

Plan the replacement

Planning ahead lets you choose between a like-for-like tank, a tankless unit or a heat pump water heater, and compare prices. Gas tanks need a certified gasfitter and a permit.

Next steps

For repairs or a quote, see hot water tanks.

Seismic straps

In BC, hot water tanks should be strapped to the wall so they can't tip over in an earthquake and break the gas or water lines. If yours isn't strapped, ask the plumber to add straps during the next visit or with the replacement.

Size check

If you're running out of hot water more than you used to and the tank is fairly new, it may simply be too small for the household, especially after adding a suite or more people.

Relief valve

The temperature and pressure relief valve has a pipe running down the side of the tank. If it drips, the tank's pressure or temperature may be too high; have it checked rather than capping it.

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