Yes, an electric water heater can last 20 years, but it is rare. The typical lifespan of a traditional tank water heater is 10 to 15 years. However, reaching the 20-year mark depends entirely on water quality, heavy usage, and consistent maintenance.
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.
An electric water heater typically lasts between 10 to 15 years. However, this lifespan can be significantly impacted by water quality, the amount of hot water your household uses, and routine maintenance.
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.
A: Traditional tank water heaters usually last 8–12 years, while tankless units often last 15–20+ years. Q: Should I replace my water heater if it's over 10 years old? A: Often yes. Even if it still works, the risk of leaks and sudden failure increases significantly after 10 years.
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.
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.
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.
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.
Replacing an electric water heater typically takes 2 to 4 hours. The vast majority of standard tank-to-tank replacements are completed within a single morning or afternoon.
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.
Most manufacturers and plumbing experts recommend flushing your water heater once a year to prevent sediment and mineral buildup, which helps maintain energy efficiency and extends the lifespan of the tank.
A Corroded Water Heater Could Cause Significant Damage
If the tank rusts through, it could fail catastrophically and flood your home. You can avoid this disaster by replacing your water heater before it fails.
Based on the manufacturer's suggested service life, the average life expectancy of a water heater is about 8 to 12 years.
Signs a Water Heater is Going Bad
Yes, most electric water heaters have a reset button, commonly known as the high-limit switch or ECO (emergency cut-off) button. It acts as an emergency safety mechanism that automatically trips and cuts power to the heating elements if the water inside the tank reaches dangerous temperatures (usually around 180∘F180 raised to the composed with power cap F180∘𝐹).
A leaky water heater doesn't have to stop you from running water as long as you're OK with a cold shower—and have already scheduled a plumber to resolve the leak. But, if you run too much water or wait too long to get a repair, you could end up with some pretty costly (and sometimes even dangerous) damage to deal with.
We recommend going with Rheem, specifically for the Professional Series with 8 Year Warranty.
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).
Its award-winning construction makes the Rheem® Marathon® water heater the most durable electric water heater ever made. And its industry-best warranty makes it a smart purchase you can count on for years to come.
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.
Yes, Costco sells water heaters, including traditional tank and tankless models (mostly from the brand Rheem). Rather than picking one up off the shelf, you purchase the unit and schedule a home consultation through their affiliated local contractors.
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.