An electric water heater should generally be replaced every 10 to 12 years, or immediately if you notice water pooling at the base of the tank.
Water Heater Lifespan
If your tank water heater is more than 10 years old, it may be time to consider replacing it. With proper maintenance, a tank water heater tank should last six to 12 years. A tankless water heater can last for more than 20 years.
Electric water heaters typically last 10 to 15 years. The exact lifespan often depends on the style of your unit and how well it is maintained:
The most reliable water heaters depend on the type of unit you need. For traditional tank water heaters, plumbers and industry experts consistently rank A.O. Smith, Bradford White, and Rheem as the most dependable brands. For tankless systems, Navien and Rinnai are the top-rated choices.
There isn't a single "number 1" model, as the ideal water heater depends on your home's setup, but top-rated brands dominating the market include Rheem (best overall tank/tankless) and A.O. Smith (best for durability and commercial-grade units).
We recommend going with Rheem, specifically for the Professional Series with 8 Year Warranty.
Excessive Water Pressure: High pressure stresses your system and shortens its lifespan. A pressure-reducing valve can help. Undersized System: A unit that's too small for your household's demand works harder and wears out faster. Proper sizing during installation is critical.
The Home Depot offers traditional water heater tanks and modern tankless units, both powered by either gas or electricity. Depending on your selection, the average cost for standard tank installation is generally between $1,600 to $2,400. Tankless installation can range from $2,400 to $5,400.
Electric hot water heater problems often show up as a complete loss of hot water, lukewarm water, strange noises, or pooling water. These issues generally trace back to faulty heating elements, a tripped high-limit switch, sediment buildup, or internal tank corrosion.
How Long Does a Water Heater Typically Last? Water heater life expectancy depends on the type of system you have. Traditional tank water heaters typically last 8–12 years, while tankless water heaters can last 15–20+ years with proper care.
A 40-gallon water heater costs between $400 and $2,000 for the unit alone, depending on the fuel type and features. Including professional installation and permits, the total cost typically ranges from $800 to $3,000+. Electric models are cheaper than gas, but installation requirements vary.
Here are some estimated labor cost price ranges for a water heater replacement: Tank-style water heater: $150 to $450. Tankless water heater: $600 to $1,900. Switching from tank-style to tankless: $150 to $2,500.
Lifespan: Tankless systems often deliver 15 to 20 or more years of service with proper care, while traditional tank systems typically provide 8 to 12 years of reliable operation.
Check the resistance of the upper heating element using a multimeter. Measure the resistance between the two screw terminals on the upper heating element. A good element will have a resistance between 5 and 25 Ohms.
How Age Determines If Water Heater Repair Is Worth It. Traditional tank water heaters last 8-12 years under normal conditions. Tankless units last 15-20 years but have higher repair costs when problems occur. Units over 10 years old with major problems should be replaced rather than repaired.
Some of the most reliable tank water heater brands in 2026 include Rheem, A.O. Smith, and Bradford White. These manufacturers have long histories of producing durable, efficient heaters with strong warranty coverage. Rheem is known for overall dependability and wide availability, A.O.
Tank to Tank Installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.
What's included in a water heater installation? A hot water heater replacement consists of: Delivery of your new water heater and haul away of old unit. Disconnect and removal of existing water heater.
This problem usually comes down to capacity, heat production, or mixing issues inside your plumbing system. Sometimes the fix is simple, like adjusting your water heater temperature or flushing out sediment. Other times you may need a new mixing valve, an element replacement, or a different size water heater.
Yes, a 10-year-old water heater is considered old. Traditional tank-style water heaters generally have an average lifespan of 8 to 12 years, meaning your unit is nearing or has reached the end of its reliable lifespan.
Does raising the temperature help? Turning the thermostat up can make the water hotter, which means you might mix in more cold water at the faucet to reach a comfortable temperature. This can slightly increase effective volume through mixing, but: It does NOT increase the actual amount of heated water stored.
There isn't a single "number 1" model, as the ideal water heater depends on your home's setup, but top-rated brands dominating the market include Rheem (best overall tank/tankless) and A.O. Smith (best for durability and commercial-grade units).
Bradford White water heaters are widely regarded as some of the most durable on the market. They come with an array of well-thought-out features that enable them to stand up to all kinds of wear and tear that results from regular use. Overall, they have a longer service life than Rheem water heaters.
Licensed plumbers install tank and tankless water heaters, including gas, electric, and hybrid heat pump systems. Home Depot and Lowe's also offer water heater installation through their network of licensed plumbers.