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:
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 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.
Based on the manufacturer's suggested service life, the average life expectancy of a water heater is about 8 to 12 years.
The cost for installing a 50-gallon water heater ranges from $800 to $2,500. This includes the heater itself and installation fees. Prices can vary based on the brand and efficiency of the unit.
The longest-lasting water heater brands are Bradford White and Rheem (specifically the Marathon series). Bradford White is favored by plumbers for professional installations and longevity, while the Rheem Marathon uses a unique fiberglass tank backed by a true lifetime warranty.
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.
If the cost of repairs exceeds 50% of the cost of buying a new water heater, replacement is likely the smarter decision, especially if your water heater is older. Older or less efficient models may result in higher utility bills. Upgrading to a newer, more energy-efficient unit can save you money over time.
The most reliable water heater brands generally include A.O. Smith, Rheem, and Bradford White for traditional tanks, and Navien or Rinnai for tankless models. These brands consistently rank highest among plumbers and consumer reviews for durability, parts availability, and long-term performance.
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.
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.
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.
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.
Yes, a water heater can last 20 years, but whether it does depends heavily on the type of unit and consistent maintenance.
If a standard showerhead is fitted, it will use around an extra half a gallon each minute, accounting for a 25-gallon emittance every 10 minutes, or 50 gallons throughout a 20-minute shower. *1 gallon = 4.54 litres.
Cost Insights: Tank water heater flushing costs $110 to $200, while tankless models run $150 to $250 due to their more complex components. Your tank size and household hot-water use affect flush time, since larger tanks take longer to drain and refill.
Signs a Water Heater is Going Bad
Electric water heaters come with a few notable drawbacks, most prominently higher monthly operating costs (because electricity is often more expensive than gas) and slower heating or recovery times. They also won't work during a power outage, and larger electric models demand significant electrical panel capacity.
Water heaters can create high energy bills if they operate inefficiently, consuming more energy to produce the same amount of hot water as a newer, well-maintained unit. Over time, sediment can build up in the tank, reducing its capacity and forcing the heater to work harder and longer to heat the water.
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).
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.
Plumbers most highly recommend Bradford White, A.O. Smith, and Rheem. These brands are heavily favored because they are highly reliable, have readily available replacement parts, and use superior internal components compared to budget models.