How long does an average water heater last?
This is actually a pretty easy question to answer, while the variance can be quite high depending on the brand, quality, and style of the water heater, your average unit has a lifespan of about fifteen years. Traditional tank water heaters will generally fall on the younger end of this spectrum while newer tankless water heaters can often last up to twenty years. As with most things, there is balance in this equation. While tankless water heaters often last longer, they are most expensive when you purchase them.
What can I do to extend the life of my water heater?
Again, the answer is simple. Maintenance. Attending to maintenance. If you fix small issues of normal wear before they have a chance to develop into something more severe, you can dramatically extend the life of your water heater. Water softeners can also extend the life of your tankless water heater.