When to Replace a Water Heater

Although a water heater can last 15 years or so, you’ll have to replace it eventually. Knowing when to replace a water heater can help you avoid unexpected breakdowns and the stress of cold showers. Jason Hawes explains more in this video, watch now!

Understanding the typical lifespan of a water heater, along with the signs that it’s time to replace it, helps you plan ahead for replacements. Replacing a water heater before it fails can save you time, money, and frustration.

How Long Do Water Heaters Last?

The lifespan of a water heater depends on the type and how well it’s maintained:

• Traditional tank water heaters: 8-12 years
• Tankless water heaters: Up to 20 years

Naturally, how long your water heater lasts will vary depending on things like:

• Water quality
• Maintenance habits
• Usage frequency

Proper maintenance and early repairs can help maximize the lifespan of any type of water heater. 

Signs It’s Time to Replace Your Water Heater

Other than age, how do you know when you should replace a water heater? Here are a few signs to look out for:

• Inconsistent hot water or water running out too quickly.
• Strange noises like rumbling or banging may indicate sediment buildup.
• Visible rust or corrosion on the tank, which can lead to leaks.
• Water leakage around the unit often signals internal damage.
• Rising energy bills suggest the heater is no longer operating efficiently.

If you notice any of these issues, schedule an inspection with a Roto-Rooter plumber. They’ll be able to take a closer look and see if your system can be repaired or requires replacement.

How Often Should You Replace a Water Heater?

Water heaters don’t last forever. Generally, you should replace water heaters every 8-12 years.

If you're unsure of your unit’s age, check the manufacturer’s label for the installation date. Many water heaters also have lifespan guidelines listed on the label. If you're approaching the 10-year mark, it’s a good idea to start budgeting for a replacement or researching newer, more energy-efficient models.

Factors That Affect Water Heater Lifespan

Several factors influence your hot water heater’s life expectancy:

• Water quality: Hard water can cause sediment buildup inside the tank, leading to reduced efficiency and eventual failure.
• Maintenance: Regular maintenance, such as flushing the tank to remove sediment and replacing the anode rod, can significantly extend the life of the water heater. Otherwise, you might face premature leaking and corrosion issues.
• Usage levels: High water demand, such as large families or households with frequent hot water use, can wear out the heater more quickly.
• Installation quality: Professional installation ensures that the unit operates at peak efficiency and lasts longer. 

Repair or Replace? How to Decide

Deciding whether to repair or replace a hot water heater comes down to a few factors:

• Repair: If your water heater is less than 8 years old and the issue is minor — such as a faulty heating element or a thermostat issue — a repair may be the best choice. Repairs are often more affordable than replacing the entire unit, and they can help extend the life of your water heater.
• Replace: If your water heater is over 10 years old or the repairs are becoming frequent and costly, it’s usually better to replace the unit. Constantly repairing your water heater can end up costing more in the long run, especially if the unit is nearing the end of its lifespan.

In most cases, the decision to repair or replace comes down to cost. If the cost of repairs is more than half the price of a new unit, replacement is likely the more economical choice.

Replacing your water heater may also offer the benefit of upgrading to a more energy-efficient model, which could result in long-term savings on energy costs.

Want to learn more about buying a new water heater? Get in touch with a Roto-Rooter professional today to get an expert opinion on your next steps.