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From the Field
Most tank water heaters last 8 to 12 years. Tankless units can last much longer. Here is what that depends on, and how to tell yours is close to done.
Short answer: A tank water heater usually lasts about 8 to 12 years. A tankless unit can last 15 to 20 years or more if it is kept up. Water quality, flushing and the age of the anode rod decide whether yours lands early or late in that range.
Makers publish lifespans as ranges, not promises. Rheem says traditional tank water heaters typically last 8 to 12 years and tankless models can last 15 to 20 years or more with proper care. Rinnai says a Rinnai tankless unit can last up to 20 years, and that water quality, how much you use it and maintenance all change the real number.
Notice the wording: "with proper care" and "up to." A tank in a home with sediment-heavy water and no flushing is at the short end. A tankless unit that is never flushed of mineral scale will not reach 20.
Gas or electric does not change the story much in the maker guidance we read. What matters more is the water going in and the care it gets. If you are still deciding between fuels, see our page on gas, electric or propane water heaters.
Inside every steel tank is a rod called the anode rod. It is made to corrode on purpose so the tank does not. Once the rod is used up, the steel tank starts to rust from the inside. Rheem says to replace the anode rod every 3 to 4 years, and that the tank needs flushing every year to clear sediment.
Sediment is the grit that settles on the bottom of the tank. It makes the heater work harder, and it is the reason old tanks rumble and pop. If yours is making noise, our page on a noisy water heater explains what the sounds mean.
Most people never touch the anode rod, which is why many tanks quit at the low end of the range. The steps for flushing are in our water heater maintenance checklist.
Not sure how old your water heater is?
Text Ryan a photo of the label on the tank. He is a licensed Master Plumber and answers his own phone, day or night. A free estimate comes before any work starts.
The range above is a national number. These local things can pull a heater toward the short end.
Rheem lists these as the common warnings on a tank unit:
Other signs show up in daily life. You run out of hot water faster than you used to, or the water never gets as hot. For those, read why hot water runs out fast and what to check when there is no hot water.
The sign that cannot wait is a leak. If the tank itself is seeping, no repair will fix it. Follow the steps on our leaking water heater page, and shut off the water and the power first.
Look at the label on the side of the tank. The manufacture date is built into the serial number. The code format is different for each brand, so look up your brand's date code on its website, or text Ryan a clear photo of the label and he can read it.
No label, or the print has worn off? Think back to when the heater went in. A closing document from a home purchase or an old receipt can narrow it down.
Rheem gives a simple rule of thumb. If a repair would cost more than half the price of a new unit, replacing is almost always the better choice. Repair makes sense when the unit is young, say under 6 to 8 years, the tank has no corrosion or leaks, and the fix is a part like a heating element, thermostat or anode rod.
Replacement is the better call when a heater has needed several repairs in a short time. Rheem also notes that units over 10 years old are more likely to fail again soon after a repair.
For costs and what a quote should include, see water heater installation cost in North Georgia. Ryan gives a free estimate, so you know the price before any work starts. If you are weighing a switch to tankless, our tank versus tankless guide compares them for mountain homes, and Navien versus Rinnai compares two common brands.
"I had my water heater fail and fill my basement with water. Ryan replaced my water heater with a tankless and repaired my main water shut off valve the next working day. The work was done beautifully, quickly and the area cleaned up neatly when he was done. Super fair pricing as well."
Not always, but start planning. Rheem says tank heaters typically last 8 to 12 years, and units over 10 years old are more likely to fail again soon after a repair. If yours is at that age and shows rust, leaks or noise, replacing it on your schedule beats an emergency at night. Text Ryan a photo for a free estimate.
The maker guidance we read gives one range for tank heaters and does not split it by fuel. Water quality, flushing and anode rod care matter more than the fuel. See our guide to gas, electric and propane if you are picking a fuel.
No. A warranty covers parts for a set time. It does not promise the heater will run that long. For example, ENERGY STAR sets a minimum warranty of 6 years on the system of a gas storage water heater, which is shorter than the 8 to 12 years makers say these units often last. Read your own warranty for the terms.
It can, but scale and sediment are the risks. Rinnai says a tankless unit can last up to 20 years and that water quality and maintenance change the result. Flushing at least once a year, and a filter or softener where the water calls for it, are the usual steps.
Shut off the water to the heater and turn off its power at the breaker, or the gas control for a gas unit. Then call or text Ryan. A tank that is leaking from the shell cannot be repaired. The full steps are on our leaking water heater page.
Call or text Ryan a photo of the label. He answers his own phone and gives a free estimate before any work starts.