How Long Does a Water Heater Last?

Water heaters are often overlooked until they malfunction. While they can last 10 to 15 years, like other complex equipment, routine service is necessary to keep them functioning properly.

If your water heater is failing, consider its age and condition. Tank water heaters typically need replacing after eight to 10 years, while tankless models should be replaced by the time they’re around 15 to 18 years old. If your water heater is reaching the end of the average lifespan, you may want to consider a replacement before you notice signs of failure, which can include:

• Low or inconsistent water temperature
• Little or no hot water
• Banging or rumbling noises
• Rust-colored water
• Strange odors
• Leaking tank

Can Maintenance Prolong the Lifespan of a Water Heater?

Yes, regular service can extend your hot water tank’s lifespan. Not draining the tank fully can also help. If you have a large family, consider installing a bigger tank. That way, you’ll have plenty of hot water for showers, laundry, and cleaning — without shortening your water heater’s lifespan.

Another tip is to perform a routine water test. Hard water causes limescale buildup, while soft water increases corrosion. If the water is hard, softening it can extend the service life of your water heater by two years.

Other water heater maintenance tips include:

Every three months

• Flush 25% of the water in the tank to reduce sediment.

Every six months

• Check the temperature with a thermometer to ensure your hot water matches the water heater setting. Call a pro if the numbers do not match.
• Check the pressure relief valve by turning off the cold water to the heater and power. Put a bucket beneath the pipe that connects to the valve. Raise and then lower the tab to let a little water out. If it keeps running, a professional can replace it. 

Every year

• Drain the tank to remove sediment. Turn off the water heater’s power and let the water drain from the tank. Run cold water briefly in it to remove sediment. Drain that, close the drainage valve, and refill it.
• Wrap the tank in an insulating blanket to avoid heat loss, especially in unheated basements, crawl spaces, and garages.
• Schedule routine water heater maintenance to catch small issues early.

Every three to four years

• Check and replace the anode rod, especially for homes with hard water. Unscrew the rod from the tank top and if it has lumpy chalk, call a technician or the manufacturer if it’s under warranty.

Is There a Difference in Lifespan Between Tank and Tankless Water Heaters?

Yes, traditional water heaters can last around eight to 12 years, while tankless water heaters can last over 20 years, depending on the water quality, usage, and maintenance. A few other differences include:

Traditional Water Heaters

A traditional water heater has an anode rod in the tank that attracts corrosive particles through electrolysis. Once corroded, the rod can malfunction, particles can settle in the tank and destroy the lining, and the water heater will need upgrading.

• Pros: Hot water is conveniently stored and always ready.
• Cons: Tanks are bulky, take up space, and can rust.

Tankless Water Heaters

Tankless water heaters efficiently provide “on-demand” hot water and only heat water when needed. Despite not having anode rods, they can sometimes rust and need replacing.

• Pros: These space-saving units can lower energy costs.
• Cons: Hot water is not instantly available.

Choose BVSM for Comprehensive Water Heater Services

Founded in 1956, BVSM Heating & Air Conditioning provides comprehensive HVAC services. Backed by a 100% satisfaction guarantee, we are members of the Beaver County Alliance for Consumer Protection, and our NATE-certified technicians receive regular training on all types of water heaters.

If your water heater needs service or replacement, you can count on us. With flexible financing, special offers, and extended warranties, our experts will look for ways to increase your savings.

Ready to enjoy uninterrupted hot water? Contact BVSM today to schedule water heater services.