A tank water heater lasts about 8 to 12 years, and a tankless unit 15 to 20 or more, by the makers' own numbers. Local plumbers on page one say anything from 6 to 8 years up to 12 to 15, because water differs by town. If you own a plumbing company, post your town's number with the reason. Add a serial number age check, and ask the tank's age on every call.
What Changed
- Rheem and A. O. Smith both put a tank water heater at about 8 to 12 years.
- A Wisconsin plumber posts 6 to 8 years and a Chicago area plumber posts 12 to 15. Both sit on page one of Google.
- The federal energy survey found 44.43 million U.S. homes, about 36%, with a main water heater 10 or more years old in 2020.
- In Google Ads data Clickflame pulled in November 2026, bradford white water heater age draws 18,100 U.S. searches a month, the same as how long do water heaters last.
- The lifespan question costs $3.42 a click. Emergency water heater repair costs $77.05.
- Ask for a photo of the tank label on every call, and log the age.
Two Plumbers, Two Numbers
A Wisconsin plumbing company tells its readers a tank water heater lasts 6 to 8 years. A company in the Chicago suburbs tells its readers 12 to 15. Both pages sit on page one of Google for the same question.
Neither one is wrong. They work on different water.
So give the plain answer first. A tank water heater lasts about 8 to 12 years. Rheem says tank units typically last 8 to 12 years and tankless units 15 to 20 or more with proper care. A. O. Smith puts the average at about 8 to 12 years. Amica, the insurer, gives the same tank range, with gas tankless at up to 20 years and electric tankless at 7 to 10.
You own a plumbing company, so why does a question like this matter to you? Because the person asking has a tank that's getting old and hasn't failed yet. That is the calm version of your best customer. The other version calls at dawn with a wet garage.
Seven Sources, Four Answers
Line up what a homeowner can find in one sitting.
| Who says it | Tank life | Who they are |
|---|---|---|
| Rheem | 8 to 12 years | Maker |
| A. O. Smith | About 8 to 12 years | Maker |
| Amica | 8 to 12 years | Insurer |
| InterNACHI | 6 to 12 years | Home inspector group |
| Vredevoogd | 8 to 12 years | West Michigan contractor |
| Team Austin | 6 to 8 years | Southeast Wisconsin contractor |
| Reliance Plumbing | 12 to 15 years | Chicago suburbs contractor |
Four of the seven repeat the makers' range. InterNACHI's chart for home inspectors lists a conventional water heater at 6 to 12 years and notes that mineral content in water can shorten its life. The two outliers are both local plumbers.
The Wisconsin page is the one to study. Team Austin doesn't borrow the national range. It commits to its own number, cites a median of seven years, and gives reasons a local would know, such as water with high mineral content and too much pressure from the city supply. A reader near Milwaukee learns something there that a maker's page can't tell them.
Compare that with the top local result. Vredevoogd's guide gives 8 to 12 years, the same range as the makers, with no source, no replacement price and no way to check a tank's age.
In November 2026, Google's AI Overview for this question led with 8 to 12 years and credited Rheem first. Repeating that range earns you nothing. Your town's number, with your reason, is the one answer the makers and the AI summary don't have.
44 Million Tanks Are Already Past Ten Years
The federal energy survey counted how old America's water heaters are. Out of 123.53 million homes, the main water heater was 10 to 14 years old in 25.10 million, 15 to 19 years old in 10.35 million, and 20 or older in 8.98 million. That adds up to 44.43 million homes, about 36%, with a heater past ten years.
Ten years is the line the makers draw. A. O. Smith lists more than 10 years old among its signs that it's probably time to replace. Rheem says units over 10 years old are more likely to fail again soon after a repair.
The survey is from 2020, so those tanks are older now or already gone. Another 38.96 million homes had a heater 5 to 9 years old that year. Any of those still in service have crossed ten years too.
None of those owners has a leak today. Many of them are trying to work out how old the tank is. The search data shows it.
The Age Check Is as Big as the Lifespan Question
These are Google Ads U.S. monthly search averages and cost per click figures that Clickflame pulled in November 2026.
| Search | A month | Cost per click |
|---|---|---|
| how long do water heaters last | 18,100 | $3.42 |
| bradford white water heater age | 18,100 | $9.52 |
| water heater lifespan | 5,400 | $2.10 |
| ao smith water heater age | 5,400 | $6.51 |
| when to replace water heater | 1,000 | $7.53 |
| water heater replacement | 40,500 | $34.22 |
| water heater leaking | 14,800 | $38.65 |
| emergency water heater repair | 1,300 | $77.05 |
Look at the second row. As many people search the age of one brand of water heater as ask how long any water heater lasts, at 18,100 a month each. Add the A. O. Smith row and the two age searches reach 23,500.
They search it because the answer is hidden. Rheem's own lifespan page says the build date is often encoded in the serial number and stops there. Bradford White prints a chart. The first two characters of its serial number stand for the year and the month, each as a letter, and the year letters repeat every 20 years. An A can mean 2004 or 2024.
A homeowner can't be expected to know that. A plumber decodes it in seconds. So put the decoding on your page for the brands you see most in your town, with a photo of where the label sits.
Now the bottom rows of the table. The calm question costs $3.42 a click. Wait until the tank fails, and the same household types emergency water heater repair at $77.05.
Take one worked example with those figures. $500 buys about 146 clicks at $3.42 and about 6 clicks at $77.05. A page that ranks for the calm question pays no bid at all.
Timing matters too. In the same data, how long do water heaters last ran at 22,200 searches a month from December through March and 18,100 in the other months. The question peaks in winter, so publish before it does.
Build the Lifespan Page in This Order
Give the answer, then the proof, then the age check. Nine parts, in this order.
- Answer in the first two lines. Give the makers' range of 8 to 12 years, then your number for your town. If you replace most tanks at year nine, say year nine.
- Give the reason. Your water utility's yearly quality report lists hardness. Link it and say what that water does to a tank. InterNACHI's chart already notes that mineral content can shorten a heater's life.
- Split it by type. Tank, gas tankless and electric tankless don't share a number. Amica's guide separates all three.
- Add the age check. Show the label, then decode the serial number for each brand you install. Offer to read it from a texted photo.
- Draw the repair line. Rheem says a repair deserves a look on a unit under 6 to 8 years old with no tank corrosion, and that replacement makes sense once the repair costs more than 50% of a new unit. Use the maker's rule or state your own.
- Say what insurance does. Amica says most standard homeowners policies won't pay to replace a leaking heater, but may cover the damage the leak causes. A reader who learns that stops counting on the policy to buy the next tank.
- Name where the tank sits. IBHS, the insurance industry's research group, lists water heaters on upper floors or in attics among the drivers of water damage inside homes. A tank over a finished ceiling is a bigger risk than a tank in a garage.
- Put your name on it. Vredevoogd's guide carries the byline of an operations director with more than 23 years in the trade. Sign yours, with your license number if your state issues one.
- Post your replacement price if you can. Only your real number, with what it includes.
Then link it to your water heater service page and your Business Profile. The phone habits that close these calls are in the plumber lead generation guide, and the Drano answer guide shows the same answer first format on a drain question.
Ask the Age on Every Call
The page brings the calm caller. Your desk decides whether that turns into a job for you this year or a job for someone else next year. Ask four things on every plumbing call, not only the water heater calls.
- Can you text a photo of the label on your water heater?
- Is it gas or electric, and is it a tank or tankless?
- Where does it sit? Garage, closet, attic or an upstairs room?
- Any rusty hot water, rumbling, or water at the base?
The first question gives you the age. Write it on the customer record. A drain call today from a home with a 2014 tank is a replacement quote you can offer before the floor gets wet.
The fourth question comes from Rheem's list. Its replacement signs include rusty or discolored hot water, rumbling or popping from hardened sediment, and water leaking from the base of the tank. If the caller says yes to any of them on an old tank, book the visit as a replacement estimate and stock the truck for it.
One more habit costs you a marker. When you install a tank, write the date on it, the way the installer did in the photo above. The next plumber, the next owner and the next home inspector will all read it.
How Clickflame Builds Water Heater Pages
When a plumbing company hires Clickflame, the water heater page opens with the makers' range and the owner's own number for that town. The age check sits under it, with the brands that company installs. The repair line and the insurance line come next, right above a tap to call number. That number is a tracked line, so the owner can see which questions turn into replacement jobs.
See websites built for plumbers and the Emergency Septic and Sewer case study, or check where your company stands now with the free local SEO grader.
Evidence
Every number in this story comes from one of these. If a figure is ours, the paragraph says so.
- Rheem, Water Heater Lifespan, When to Repair vs. Replace (March 2026)
- A. O. Smith, When to Repair or Replace Your Water Heater
- A. O. Smith, How Long Do Water Heaters Last
- Amica Insurance, How Long Do Water Heaters Last?
- InterNACHI, Standard Estimated Life Expectancy Chart for Homes
- Vredevoogd Heating and Cooling, How Long Does a Water Heater Last? A Guide
- Team Austin, How Long Does a Water Heater Last? (May 2023)
- Reliance Plumbing Sewer and Drainage, Signs You've Got a Dying Water Heater (January 2022)
- US EIA, 2020 Residential Energy Consumption Survey, Table HC8.1, Water Heating in U.S. Homes
- Bradford White, Serial Number Date Code Reference
- IBHS, State of the Risk, Interior Water Damage
Clickflame builds the websites and runs the local search and ads for service businesses that live on the phone ringing. See websites built for plumbers, look at the work, or pick a time and we will look at your numbers with you.
Help Desk Answers
What is the average lifespan of a hot water heater?
About 8 to 12 years for a tank. Rheem and A. O. Smith both give that range. InterNACHI's chart for home inspectors lists 6 to 12 years. Hard water and skipped upkeep pull the number down, so a local plumber's figure for your town can sit above or below the makers' range.
How long does a tankless water heater last?
Longer than a tank. Rheem and A. O. Smith say 15 to 20 years with proper care. Amica splits it by fuel, with gas tankless at up to 20 years and electric tankless at 7 to 10.
How can I tell how old my water heater is?
Read the serial number on the label. Each maker codes the build date its own way. On a Bradford White, the first two characters are letters for the year and the month, and the year letters repeat every 20 years. If you can't decode it, text a photo of the label to a plumber.
Should I replace a 10 year old water heater that still works?
Plan for it. A. O. Smith lists more than 10 years old among its signs that it's probably time to replace. Rheem says units over 10 years old are more likely to fail again soon after a repair. Get the age checked and a price in hand before the tank picks the day for you.
Does homeowners insurance pay for a new water heater?
Usually not. Amica says most standard homeowners policies won't pay to repair or replace a leaking water heater, but may cover the damage the leak causes. Coverage depends on the policy, so read yours.
Should a plumber post a lifespan number that differs from the maker's?
Yes, if the jobs back it up. Team Austin in Wisconsin posts 6 to 8 years and gives its reasons, and that page sits on page one. Give the makers' range first, then your number and why your town's water moves it.
