Yes, you should strongly consider replacing a 15-year-old water heater. Most traditional tank water heaters have an expected lifespan of 8 8 to 12 12 years. At 15 years, your unit is living on borrowed time, and the risk of a catastrophic tank failure or costly flood increases significantly.
Water heaters typically have a lifespan of about 10-15 years. If your unit is nearing or surpassing this age, it's time to start planning for a replacement. Older units are more prone to problems and less energy-efficient than newer models.
Signs a Water Heater is Going Bad
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.
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.
Some issues can be resolved with repairs, but if your water heater is more than 10 years old, replacing it may be the best option. With the right water heater parts and accessories, you may be able to fix a water heater yourself.
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.
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.
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.
Water leaks are perhaps the most common type of water heater issue you'll face. Any water heater will start to leak eventually, as by nature water will eventually corrode your tank and create microscopic cracks or fractures. However, this isn't always a sign that your tank is what's leaking.
If you are looking to properly decommission, drain, or dismantle an old water heater for replacement, the process involves safely shutting off the power and water, completely draining the tank, and carefully disconnecting the plumbing.
Tankless water heaters are the longest-lasting, averaging 20+ years, while the Rheem Marathon leads tank-style heaters with a lifetime warranty. Standard steel-tank models fail within 8–12 years, so maximizing longevity requires either choosing a premium model, a tankless unit, or maintaining standard units.
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.
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 hot water runs out too soon, maybe the heater's too small, or it's slow to reheat, or there's buildup inside. You might notice water getting colder faster, or weaker pressure. There are ways to keep your supply steady, but let's look at some common questions.
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.
Naturally, tanks that heat more gallons of water typically have a higher price point, so the larger the tank size, the more you can expect to pay. For example, the average 40-gallon water heater installation cost runs between $1,000 and $2,500, while its 80-gallon counterpart runs between $2,650 and $3,910.
Water heaters combine electricity or natural gas with pressurized water—three elements that can be extremely dangerous if not handled correctly. An unsafe installation can result in: Gas leaks that could cause carbon monoxide poisoning or explosions. Electrical hazards leading to shocks or fire.
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).
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.
Yes, select Rheem water heaters qualify for the federal Energy Efficient Home Improvement Credit (Section 25C). Eligible units include specific high-efficiency Heat Pump models and advanced Gas Tankless/Tank models.
Installing a 40-gallon hot water heater typically takes 2 to 4 hours for a professional plumber to complete a standard, like-for-like replacement. This process includes draining the old tank, disconnecting lines, installing the new unit, and testing it. Complex installations, such as those requiring code upgrades, may take up to 6 hours.
Yes, a 40-gallon water heater is generally sufficient for a family of 3. It will comfortably provide enough hot water for daily showers, washing dishes, and normal laundry loads, provided you use hot water conservatively and do not run multiple major appliances simultaneously.