Hot water tanks can last anywhere from 5 to 25 years. It seems these days your average tank is more likely to last around twelve years. It is important to look for signs of failure before they actually spring a large leak while you are inevitably out.

The rust at the top of this electric hot water tank is a good indicator it has reached the end of its useful life. Be careful because rust on the top of the tank might have little to do with the actual water reservoir. A moist environment, dripping objects hung above the tank or the back drafting of natual gas hot water tank can cause rusting. The later being a very serious issue as along with the moist air causing the rust carbon monoxide also enters your home.