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Is it worth repairing an old water heater?

Usually not once a tank water heater passes about 10 years. A. O. Smith puts typical life at 8 to 12 years, and a leaking tank cannot be repaired at all. A cheap part on a dry, sound tank can still be worth fixing to buy time while you plan a replacement. Corrosion, rusty water, leaks or repeat failures on an old heater mean replace.

Free to ask. Local shops send quotes, and you pay only when you book one.

By Kasra Taheri, Founder, LoclisPublished

Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.

This is a job for a licensed pro in Virginia

This page explains what the work involves, the permits, what a licensed pro does and what drives the cost. It does not give step-by-step instructions, because this work needs a licence, a permit or both, and doing it wrong can injure someone. Before you hire, check the licence on Virginia's DPOR record.

For a tank water heater past about 10 years old, a repair is usually money spent delaying a replacement you will need soon anyway. For a younger heater with a dry, sound tank, replacing a failed part is normally the right call. Between those two, three things decide it: whether the tank itself is leaking, what the repair costs next to a new heater, and whether you would rather replace on your schedule or in an emergency.

A gray electric tank water heater in a closet, held by straps, with a yellow EnergyGuide label, a relief valve on top and a drain pan below
Photo: Steven Pavlov, CC BY-SA 4.0, via Wikimedia Commons

How long a water heater lasts

A. O. Smith puts the average life expectancy of a water heater at about 8 to 12 years.[1] The range depends on where the heater sits and how it is designed, how well it was installed, how it has been maintained and the quality of the water.[1] Hard water is one water-quality factor to know about: Virginia Cooperative Extension notes that "Hard water can also reduce the efficiency and life span of water heaters."[6] If you are not sure about yours, a qualified laboratory can test your water for hardness.[6]

Its advice for a heater at the end of that range is clear: "At 10 years old, replacement is often the smarter move."[1] It adds that a heater that age that also leaks, often runs out of hot water or behaves erratically is a strong sign a repair would only put off the replacement.[1]

The one problem that settles it: a leaking tank

Before weighing costs, find out where any water is coming from. A. O. Smith is plain that a leaking tank cannot be repaired and the heater has to be replaced.[3] A leak from a pipe fitting, the drain valve or the temperature and pressure relief valve is a different matter and is often a modest repair. Our leaking water heater answer explains how a plumber tells them apart.

For an old heater with any serious leak, A. O. Smith's view is that "In most cases, it is more cost-effective to replace an old water heater than repair it."[2]

Signs an old heater is near the end

ENERGY STAR warns: "If your water heater is 10 years old or older, chances are it is heating water inconsistently, or worse—going to altogether fail and flood your home."[4] Its warning signs are visible corrosion around the water lines or on the unit, water leaking from any joint, seal or seam, rust in the water, a lack of hot water, and rumbling noises.[4]

Rusty hot water deserves particular weight: ENERGY STAR says rust in the water usually means the inside of the heater is corroding.[4] On a tank the anode rod is the part that corrodes in place of the steel, and A. O. Smith says "These rods usually last 3-5 years before they need to be replaced."[2] On an old heater whose anode was never checked, the rod may have been used up long ago.

When a repair is still worth it

A repair makes sense when the heater is well inside its expected life, the tank is dry, and the fault is a single part: an element, a thermostat, a relief valve, a drain valve, a thermocouple or igniter. It can also make sense on an older heater if the part is cheap and you want a few weeks to choose a replacement instead of taking whatever is in stock that day.

Two checks before you decide:

  • The warranty. A. O. Smith advises owners to review the warranty for what it covers on repair or replacement costs.[1] A part still under warranty changes the sums.
  • The repair against the replacement. Ask the plumber for both prices at the same visit. If the repair is a large share of a new heater on a tank already near 10 years, replacement usually wins.

Replacing on your schedule

The main reason to replace an old heater before it fails is control. ENERGY STAR's advice is to plan the next replacement early, so you have time to research and choose the right technology before the old heater becomes an emergency.[5] That is especially true for a heat pump model: "Your installer may need time to order the proper model, and it may take longer to install than a standard water heater."[5]

Running costs matter too. "Your water heater is the second largest energy user in your home, after heating and cooling",[4] and ENERGY STAR says certified heat pump water heaters are up to four times more efficient than conventional water heaters.[4] They need the right spot: ENERGY STAR calls for an indoor space that stays between 40 and 90 °F all year, with 1,000 cubic feet of air space around the heater.[5] See what water heater replacement costs in Virginia and what replacing a gas or electric water heater involves for the next step.

When to call a licensed pro

Call for a repair-or-replace assessment when the heater is near or past 10 years and anything changes: less hot water, rusty water, new noises, damp at the base, or a relief valve that drips. Call right away for an active leak.

If you smell gas, do not wait for an assessment. Columbia Gas of Virginia tells its customers to "go outside and call 911 and then call us at 1-800-544-5606 (24/7)."[10] If another company supplies your gas, use its emergency number.

Both the repair and the replacement are licensed work. Under Virginia law no individual may work as a tradesman without a licence, and the Code's definition of a tradesman covers electrical, plumbing and heating, ventilation and air conditioning work done for the public for pay.[8][9] Check any business on DPOR's License Lookup[12]. For a replacement, the Board for Contractors' advice is "Get at least three written bids."[7] and it reminds homeowners: "Virginia law requires all licensed contractors to provide a written contract for residential work."[7] A replacement may also need a permit: the building code's permit exemption for replacing mechanical appliances in single-family homes covers only equipment not fueled by gas or oil,[11] so a gas heater swap falls outside it. Ask your building department about an electric one, and see water heater permits in Virginia.

Getting quotes in Virginia

Loclis lists DPOR-licensed businesses with their licence number and class. Find plumbers in Blacksburg, browse water heater repair, or read more plumbing repair answers.

Describe your water heater and its age and licensed local businesses quote the repair or the replacement.

Common questions

How old is too old to repair a water heater?
There is no fixed cut-off, but A. O. Smith puts typical life at 8 to 12 years and calls replacement often the smarter move at 10. A cheap part on a sound, dry tank can still make sense past that, as a bridge while you plan the replacement.
Can a leaking water heater tank be repaired?
No. A. O. Smith says a leak in the tank cannot be repaired and the heater must be replaced. Leaks from a pipe fitting, the drain valve or the relief valve are different and are often repairable.
How do I find out how old my water heater is?
Look at the nameplate on the side of the tank. It carries the model and serial number, and the manufacturer can usually tell you the heater's age from the serial number.
Should I replace a working 12-year-old water heater?
ENERGY STAR advises replacing before it breaks, because a heater of 10 years or more risks failing and flooding the home. Planning ahead also gives you time to compare models, such as a heat pump water heater, rather than taking whatever is in stock.
Is a heat pump water heater worth it when replacing an old one?
It can be. ENERGY STAR says certified models are up to four times more efficient than conventional water heaters, but they need a space that stays between 40 and 90 degrees year-round with enough air around them. Ask installers to price both options.

Sources

  1. [1] When to Repair or Replace Your Water Heater, A. O. Smith. Checked October 26, 2026.
  2. [2] How to Diagnose, Fix, and Prevent Water Heater Leaks, A. O. Smith. Checked October 26, 2026.
  3. [3] How to Adjust Temperature on Gas Water Heater Safely, A. O. Smith. Checked October 26, 2026.
  4. [4] ENERGY STAR Certified Heat Pump Water Heaters fact sheet, ENERGY STAR, U.S. Environmental Protection Agency. Checked October 26, 2026.
  5. [5] Heat Pump Water Heaters, ENERGY STAR, U.S. Environmental Protection Agency. Checked October 26, 2026.
  6. [6] Virginia Household Water Quality Program: Hardness in Household Water (publication 442-664), Virginia Cooperative Extension, Virginia Tech. Checked October 26, 2026.
  7. [7] What You Should Know Before You Hire a Contractor, Virginia Board for Contractors, DPOR. Checked October 26, 2026.
  8. [8] Va. Code § 54.1-1129, Necessity for licensure, Code of Virginia, Virginia General Assembly. Checked October 26, 2026.
  9. [9] Va. Code § 54.1-1128, Definitions, Code of Virginia, Virginia General Assembly. Checked October 26, 2026.
  10. [10] Natural Gas Safety, Columbia Gas of Virginia. Checked October 26, 2026.
  11. [11] 13VAC5-63-80, Virginia Uniform Statewide Building Code, Section 108 Application for permit, Virginia Administrative Code, Virginia General Assembly. Checked October 26, 2026.
  12. [12] License Lookup, Virginia Department of Professional and Occupational Regulation. Checked October 26, 2026.

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