As a homeowner, you know that different systems within your home need to be replaced at intervals. One of the biggest systems you need to keep an eye on is your water heater. While water heaters are generally expected to last approximately ten years, this isn't always the case. Depending on a number of factors, your water heater may last 20 years or more, or you may find that it gives out after only a few years. It's good to have an approximate idea of how long your particular water heater will last.

Installation

One of the biggest factors that helps determine how long your water heater will last is how it was installed. Improper installation affects the lifespan significantly. It's crucial that your water heater is installed upright—if it is on its side, there is inadequate support. This leads to structural stress and will cause premature failure of the water heater system. Well-ventilated areas are the best for water heaters. While this helps with nitrous-oxide buildup and fire safety, it also extends the life of the water heater.

Usage

As you're considering how long your water heater will last, make sure you keep in mind how much you use it. The more hot water used throughout the home, the more the system has to work. Water heaters with less usage generally last longer than those with a huge output. Make sure you get a water heater that can stand up to the volume you plan to use.

Water Type

The type of water in your area affects your water heater. If the water is corrosive, it's going to significantly shorten the lifespan of your water heater system. One way to help determine the life of your water heater is to get your water tested for corrosive chemicals. Along with this, hard water is more damaging to water heaters. If you have hard water, you can help extend the life of your water heater by getting a water softener.

Proper Maintenance

Keeping your water heater maintained extends how long the system lasts. If you are purchasing a home with an older water heater, or if it's been a while since you last got maintenance, make sure to get someone over to service the system. A good flush and maintenance helps get rid of dirt, debris, and minerals from the system

System Type

There are many different types of water heaters, and the style of your water heater affects how long it lasts. For example, a glass lined water tank is coated to help resist corrosion. Since there is less corrosion in the system, it is likely to last longer than older systems without this protection. A tankless system tends to last longer than a traditional tank water heater, with life spans of up to 20 years or more.

When you're estimating the life expectancy of your water heater, consider consulting with a professional. They can help you understand how your system works, explain the general span of your system, and offer suggestions to keep it running as long as possible.