Replacing a 50-gallon hot water heater typically costs between $1,500 and $3,000 for the unit and professional installation. Electric models are generally on the lower end ($1,000 to $1,800), while gas units—especially complex power-vented systems—cost more due to higher installation and venting requirements.
A 50-gallon tank water heater typically lasts between 8 to 12 years, though well-maintained units can stretch to 15 years. The exact lifespan depends heavily on your local water quality, how often you flush the tank, and the condition of the sacrificial anode rod.
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 "best" water heater depends on your preferred fuel type and whether you want a traditional tank or a tankless system. Master plumbers and consumer experts consistently rank Rheem, A. O. Smith, and Bradford White as top overall brands.
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).
Beginning in 2023, the expanded version of 25C, now called the Energy Efficient Home Improvement Tax Credit (under the Inflation Reduction Act of 2022), will provide up to $2,000 in tax credits for qualified high efficiency water heaters as well as credits for electrical upgrades.
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.
Heat pump water heaters move heat from one place to another instead of generating heat directly for providing hot water, resulting in high efficiencies and significant cost savings. Solar water heaters use the sun's heat to provide hot water and also save money on energy bills.
Next, make sure the installation area is clean. Remove any debris or clutter from the area, and keep your pets safely secured in another room of the house. There should also be a clear path for the service provider to bring the new water heater inside your home.
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.
A 10-minute shower typically uses 50 gallons of water if you are using an older, inefficient showerhead (rated around 5 Gallons Per Minute - GPM). With a standard modern showerhead (2.5 GPM), it would take a 20-minute shower to reach 50 gallons.
If your heater is showing signs like leaks, rust-colored water, inconsistent temperatures, or increased energy bills, replacement is often the most economical solution. Rheem recommends beginning replacement planning around year 10 to maintain reliable performance and avoid unexpected issues.
Professional installation costs to replace a water heater
The more hours of electrical, carpentry and plumbing work that are required for your installation (for example, installing new electric, water or gas lines or drywall), the higher your total water heater replacement cost.
Replace your water heater if it is leaking from the tank, shows visible rust, or is over 8–12 years old. You should also consider replacement if you notice rumbling/banging noises, a drop in hot water capacity, or require frequent, costly repairs on an aging unit.
Benefits of Choosing a 50-Gallon Electric Water Heater
A 50-gallon tank provides enough hot water for a family of moderate size. Multiple showers, washing machines, and dishwashers can run without rapidly depleting the hot water supply.
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.
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.
When shopping for a new water heater, you need to consider the type of system, your home's fuel source, the capacity/flow rate needed for your household, and the overall energy efficiency to keep utility bills low.
We recommend going with Rheem, specifically for the Professional Series with 8 Year Warranty.
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.
Natural gas is usually the cheapest way. Even with higher gas prices, a heating system fueled by natural gas is typically less than electricity, propane, or heating oil. Energy efficiency is another way to assess the cost of a heating system. An energy-efficient heating system saves you money on your heating bill.
The "7-minute rule" at Home Depot refers to the attendance grace period, which dictates that you can clock in up to 7 minutes after your scheduled start time without being marked tardy. If you clock in at the 8-minute mark or later, you will receive an attendance occurrence (or half-point penalty).
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.
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.