Water heater over 10 years old: should it be replaced before buying?

In short

A tank water heater generally lasts 10 to 12 years. Past that age, the risk of the tank leaking rises quickly, and a failing tank dumps tens of litres on the floor. That is why many insurers require its replacement or exclude water damage from an appliance that is too old. The manufacturing date is on the label: it is the first thing to read.

How its condition is judged

The manufacturing date appears on the rating plate, in plain text or within the serial number (manufacturers publish the key). The inspector notes the age, corrosion at the base and fittings, the condition of the relief valve, the presence of a drip pan and of a nearby drain.

A water heater without a drip pan in a room with no floor drain is the costliest case when it leaks: the water goes into the finishes. The pan only helps if it is connected to a drain.

What it changes for the purchase

Call the insurer with the age of the appliance. Some require replacement within months of purchase; others apply a deductible or an exclusion for an appliance over ten or twelve years old.

It is an easy item to negotiate: known cost, quick job. A seller rarely refuses to replace it or to adjust the price accordingly.

Orders of magnitude

Replacing a standard electric tank water heater, installed by a plumber, most often runs from a few hundred to a little over a thousand dollars; a connected drip pan and a leak detector with alarm add little. Orders of magnitude to confirm with a quote.

What to do before buying

Read the date on the label and send it to the insurer before lifting the condition.
Check for a drip pan connected to a drain, otherwise plan one.
Install a leak detector with alarm as soon as you move in, whatever the age.

What Clarity does with it

Clarity notes the water heater’s age, corrosion and the absence of a pan or drain, and puts the call to the insurer among the steps before lifting the condition.

Does your report mention this? Clarity tells you in five minutes what is priority, what to have checked and what to ask the seller.

Analyze my report

Frequently asked questions

A 15-year-old water heater that works fine, must it be changed?

It works until the day the tank leaks, without warning. The question is one of risk and insurance, not of function.

Does a rental unit change anything?

A rented water heater is maintained and replaced by the supplier; check the contract, which often follows the house.

Tankless, same rule?

Tankless water heaters last longer and store no water; the risk of a major leak is much lower.

Sources