Yes, you can replace a water heater yourself if you have moderate plumbing and electrical skills. However, it involves handling heavy equipment, high-voltage electricity, and potentially dangerous gas lines. The exact requirements and safety considerations depend heavily on the type of unit you have.
While the idea of saving money on labor might be appealing, DIY water heater replacement—whether gas, electric, or tankless—isn't as simple as swapping out an old unit for a new one. It requires technical know-how, physical effort, and a solid understanding of plumbing and safety codes.
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.
The Home Depot strongly recommends that you use an experienced, licensed plumber to install your new water heater, because they will know the required codes to complete a safe and compliant installation.
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.
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.
Traditional tank water heaters last 8 to 12 years, while tankless models typically last 15 to 20 years. Lifespans vary greatly depending on water quality, unit design, and whether you perform regular maintenance like flushing the tank and checking the anode rod.
Average Water Heater Installation Cost
Mid-range installations, which may involve larger tanks or higher-efficiency models, typically cost $1,500 to $2,500. High-end installations, such as tankless systems or jobs that require major electrical, gas, or venting upgrades, can reach $3,000 to $4,000 or more.
Lowe's gas water heater installation costs typically range from $1,000 to $2,500 total, depending on the unit size and your location. The labor and permit fees alone generally cost between $600 and $1,200, while the gas water heater unit itself adds $400 to $1,300+ to the overall price.
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.
Stores like Home Depot and Lowe's often include removal when delivering a replacement unit. This is the most convenient option, especially if the old unit is still in place and connected.
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.
A new 40-gallon water heater costs between $𝟒𝟎𝟎 and $𝟐,𝟎𝟎𝟎 for the unit alone, depending on the fuel type, brand, and efficiency. When factoring in professional installation, the total typically ranges from $𝟖𝟎𝟎 to $𝟑,𝟎𝟎𝟎.
If the project is as simple as replacing an old water heater with a new one, a handyman can likely do it with no trouble. However, converting a gas water heater to an electric one or putting in specific wiring and framing for the water heater will likely require the skill set of a licensed professional.
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.
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.
Lowe's provides installation and replacement services but does not offer servicing, repairs or ongoing maintenance. Additional fees may apply: An emergency fee may apply if you need work completed the same day and you purchase the project after noon on that day or if you need the job completed on a weekend or holiday.
Prices vary based on energy source and installation complexity. The national average cost to install a 50-gallon water heater is $900 to $2,500, with most homeowners paying around $1,800 for a standard natural gas, high-efficiency 50-gallon unit.
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.
A 50-gallon water heater is generally considered the "sweet spot" and is perfectly sufficient for a family of four, provided your household follows a few common-sense habits:
Replacing a 55-gallon water heater costs between $1,500 and $3,500 on average, including both the new unit and professional installation. The exact price depends primarily on your fuel type, building code upgrades, and permit requirements.
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.
When searching for the most reliable water heater, professional plumbers consistently recommend A.O. Smith, Bradford White, and Rheem. For long-term tank durability and a "set-it-and-forget-it" experience, A.O. Smith and Bradford White are top choices. If you prioritize high-tech smart features and energy efficiency, Rheem is a market leader.
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.