How Much Is A 50 Gallon Ao Smith Water Heater? A Complete Cost Breakdown

Your 15-year-old water heater just leaked a puddle across the basement floor. Or maybe it’s still working, but it rumbles like a freight train every morning. Either way, you’re looking at a new 50-gallon unit and wondering about the price tag. For many households, a 50-gallon tank is the sweet spot: enough hot water for a family of four, but not so large that it wastes energy.

This article walks you through the real costs of a 50-gallon A.O. Smith water heater, from the sticker price to installation extras you shouldn’t ignore. You’ll learn why one model can cost $600 and another $1,500, what the installation trade will charge, and how to avoid surprise fees. By the end, you’ll know exactly what to budget and which questions to ask your plumber.

A. O. Smith

A.O. Smith GPVX-50L ProMax SL Power Vent…

• Blue Diamond glass coating provides superior corrosion resistance compared to the industry-standard glass lining
• All models feature an exclusive 3-position rotatable blower outlet which adds flexibility
• Combined horizontal and vertical vent runs up to 180 equivalent feet with 4-in diameter venting (ABS, PVC, CPVC and polypropylene)

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One popular option that covers many of the bases is the A.O. Smith GPVX-50L ProMax SL Power Vent Gas Water Heater. It includes a Blue Diamond glass coating that resists corrosion better than standard linings, a rotatable blower outlet for flexible vent routing, and an electronic gas control with a status light. If you need a power vent model (more on those below), this one is worth looking at. Compare it with Rheem models to see which fits your home best.

Base Price Range: What Determines the Sticker Price

A 50-gallon A.O. Smith water heater typically runs between $600 and $1,800 for the unit alone. That’s a wide spread, but three main factors push the number up or down.

Fuel Type

Electric models are the cheapest to buy. A standard 50-gallon electric unit from A.O. Smith lands around $600–$900. Gas models cost more because they need a burner assembly, a gas valve, and a venting system built in: expect $700–$1,200. Power vent gas models, like the GPVX-50L mentioned above, are the priciest. They add a blower motor and more complex venting hardware, pushing the unit price to $1,200–$1,800.

Warranty Length and Tank Quality

A.O. Smith offers 6-year, 9-year, and 12-year warranty lines. Longer warranties usually come with thicker tank steel, better glass lining, and sometimes a larger anode rod. That adds $100–$300 to the price. For a family that plans to stay put for a decade, the 9- or 12-year version pays off. If you’re flipping the house next year, stick with the 6-year.

Efficiency Rating

Higher efficiency means a higher purchase price but lower gas or electric bills. A standard 50-gallon gas water heater has a Uniform Energy Factor (UEF) around 0.60–0.65. High-efficiency models reach 0.70–0.80. The difference in annual operating cost is roughly $50–$100. Over a 10-year lifespan, that can justify an upfront premium of $200–$400.

Installation Costs: The Half You Might Forget

The unit price is only half the story. Installation can add $400 to $1,200, and in some cases more if major changes are required.

A basic swap of an old 50-gallon gas water heater in a basement with existing gas line, exhaust vent, and water connections runs $500–$700. That includes hauling away the old unit, installing the new one, and testing for leaks. An electric swap is usually a bit less, $400–$600, because there’s no venting to deal with.

Power vent models add labor. Running new PVC vent pipe from the blower to an exterior wall can take a few hours. If your old unit was standard atmospheric vent (metal pipe going up a chimney) and you’re switching to power vent, the installer may need to cut a hole in the wall and run wiring for electricity. That upgrade can push installation to $800–$1,200.

Other common add-ons: an expansion tank ($80–$150) if your local code requires one, a drip pan ($30–$50), flex connectors ($20–$40), and a seismic strap kit ($15–$30). Material markups from the plumber can double those numbers.

Gas vs Electric vs Power Vent: Which 50-Gallon A.O. Smith Makes Sense for Your Home?

Choosing the wrong type can cost you hundreds in extra installation or high energy bills. Here’s a side-by-side look to help you pick.

Notice that power vent units are the most expensive to buy but cheapest to run. If you have natural gas and your basement has no chimney, the power vent option is often the only legal way to install a gas water heater. Check local codes before buying.

For more on performance, see how long a 50-gallon water heater stays hot — it varies by recovery rate and insulation.

Hidden Costs and Upgrade Traps

Even after you settle on a model and get an installation quote, a few surprise costs can pop up.

• Permits and inspections. Many cities require a permit for water heater replacement. Cost: $50–$200. If you skip it and sell the house later, the inspection can flag an unpermitted install.
• Gas line upsizing. If your new water heater has a higher BTU input than the old one, the gas pipe may need to be larger. That adds $200–$500.
• Water softener tie-in. Hard water shortens water heater life. If you don’t have a softener, consider installing one. That’s a separate project, but it protects your investment. Learn how a water softener affects your hot water heater.
• Replacing old valves and pipes. Corroded shut-off valves or old copper flex lines often get replaced during installation — another $100–$200.

Frequently Asked Questions

How much does a 50-gallon A.O. Smith water heater cost?

The unit itself ranges from about $600 for a basic electric model up to $1,800 for a high-efficiency power vent gas model. The most common mid-range standard gas models fall between $800 and $1,100. Always check the current price on Amazon because retail prices fluctuate.

What affects the price difference between A.O. Smith models?

Fuel type (electric, gas, power vent) is the biggest factor. Next comes warranty length (6, 9, or 12 years) and efficiency rating. Some models also include premium features like stainless steel burners, a longer anode rod, or a digital display. Those add $100–$300.

Is installation included in the price when I buy online?

No. Online sellers sell the water heater only. Installation is a separate cost handled by a local plumber. Some big-box stores offer installation services, but they subcontract to a local company. Expect to pay $400–$1,200 depending on complexity.

How long do A.O. Smith 50-gallon water heaters typically last?

With proper maintenance — annual flushing and anode rod inspection — most last 10 to 12 years. The Blue Diamond glass lining on models like the GPVX-50L helps resist corrosion, which can extend life by a year or two. Hard water and high temperature settings shorten lifespan.

Are there any additional costs I should budget for beyond the unit and labor?

Yes. Plan for a permit ($50–$200), expansion tank if required by code ($80–$150), a drip pan ($30–$50), and possibly new shut-off valves or gas line upgrades. An extra $200–$500 in materials is common. Always ask your plumber for a detailed written estimate before work starts.

Key Takeaways

• A 50-gallon A.O. Smith water heater costs $600–$1,800 for the unit alone, depending on fuel type, warranty, and efficiency.
• Installation adds $400–$1,200. Power vent models cost the most to install because of venting requirements.
• Standard electric models are cheapest to buy but more expensive to run. Gas models (especially power vent) have lower operating costs.
• Don’t forget hidden costs: permits, expansion tank, and possible gas line upgrades. Budget an extra $200–$500.
• Choose a warranty that matches how long you plan to stay in the home. Longer warranties cost more upfront but can save replacement costs later.
• Always get a written quote from a licensed plumber before ordering the water heater. Compare at least two quotes.
• Check the current price on Amazon for any model you consider, because prices change frequently and online retailers often beat local supply houses.