How Long Does a Water Heater Last?

Like any other home appliance, water heaters have a lifespan. Regular maintenance can keep it working reliably for many years, but eventually, every water heater needs replacing. 

As experienced plumbers in Euclid, Ohio, we receive many calls from homeowners who need help with their water heaters. Many ask us, “How long does a water heater last?” and worry about whether they’ll need to invest in a new one soon.

When Can You Expect to Replace a Water Heater? 

The type of water heater you have determines its expected lifespan. Tank water heaters, which store heated water and replenish it throughout the day, typically last 10 to 15 years before they need replacing. Tankless water heaters, which heat water on demand, usually last for about 20 years. 

These are just estimates, and multiple factors influence the exact lifespan of your water heater. 

Why Water Heaters Fail 

Over time, you may notice that your water heater doesn’t perform as well as it once did. This decreased performance can happen for various reasons, with wear and tear and a lack of maintenance topping the list. 

Tank Water Heater Issues

If you have a conventional or tank water heater, a lack of maintenance, or more specifically, flushing the tank to remove sediment, is the most common reason for failure. Over time, minerals in the water can settle at the bottom of the tank and accumulate. When this happens, it can contribute to corrosion that causes a leak.

Sediment build-up can also affect the heating elements in the tank. The minerals coat and insulate the heating elements and keep them from being able to heat the water efficiently. This causes the heater to work harder and use more energy to warm water, putting more wear and tear on the mechanical components. 

Flushing the tank at least once a year to remove sediment is an essential task for keeping the water heater running for many years. However, another common issue is corrosion on the anode rod, the part of the tank that protects the steel tank from rust and deterioration. If this rod corrodes, the tank can also corrode and crack, causing a leak.

Tankless Water Heater Issues 

If you have a tankless water heater, the answer to “How long does a water heater last?” depends more on your water quality than the appliance. While low-quality tankless water heaters will almost always fail sooner than a well-made model, the mineral content of the water in your area can also speed up failure. 

Tankless water heaters have more mechanical elements than conventional models and, therefore, require more ongoing maintenance to stay in good condition. Scheduling annual maintenance service to clean and inspect these components increases the likelihood of getting 20 years or more out of the unit. 

Signs of Impending Water Heater Failure 

Water heaters don’t typically fail without warning. Usually, there are signs of impending trouble well before it stops working and leaves you taking a cold shower. Sometimes, a plumber can make repairs to get the heater working again, but if the appliance is old and nearing the end of its useful life, they’ll likely recommend a replacement. 

You should plan on replacing the unit soon at any of the following signs of impending failure:

• Discolored water. A failing water heater can make the water look dirty or rusty, a sign of corrosion inside the tank. 
• Unreliable heating. If the water doesn’t reach the desired temperature or the heating is inconsistent, there could be an issue with the gas or electric coil, and the water heater is in its final days. 
• Strange noises. Unusual noises, like cracking, popping, rumbling, or gurgling, can indicate hardened sediment inside the tank, causing it to work harder than it should.
• Leaks. A leak in the water heater is a surefire sign that it’s time for a new one. Excess pressure inside the tank due to a malfunctioning valve or high-temperature setting can cause a leak.
• Visible damage. Any visible damage, like rust, dents, or cracks, means it’s time for a new water heater, especially if the appliance is over ten years old. 

Replace Your Water Heater Before It Fails 

The last thing you want is for your water heater to fail, forcing you to shop for a new one under pressure. Now that you have the answer to “How long does a water heater last?” check the age of yours. Look for a sticker indicating the manufacturer or installation date, or use the serial number to find information about the appliance from the manufacturer. 

If your water heater is nearing the end of its lifespan or showing signs of age, start shopping for a replacement now. Doing so can save you money since you won’t have to pay emergency service fees or repair water damage that can occur when the heater breaks down. 

Shopping for a new water heater before your existing one fails also allows you to do your homework and choose the model that works best for your budget and needs. Chances are, you have had your current water heater for a decade or two and aren’t aware of the new technology and options. Instead of buying the first water heater you can find under duress, give yourself some time to identify the best choice for your money.

Get Help from the Most Trusted Local Experts 

If you’re facing a high gas bill due to your water heater, notice changes in the hot water supply, or have any other problems with water heater performance, call Formica Plumbing & Sewer Co. for help. Whether you need repairs or a brand-new water heater, our local plumbing professionals are here to help with prompt, reliable service that you can count on. 

Don’t wait for a water heater emergency to cause unnecessary stress. If you aren't sure about the answer to "How long does a water heater last?" get help from the plumbers your neighbors in Euclid and throughout northeast Ohio trust. Call 440-557-4605 or schedule an appointment online. 



Author Bio:

Matt Formica

He worked side by side with his cousin, Frank D. and sister Linda, in the office. The company has grown and now has six vans helping the surrounding communities with plumbing and sewer issues.