Quick answer: A leaking water heater should be checked the same day. Turn off its power or gas and close the cold water supply valve, then call our 24/7 line to get a licensed plumber who finds the leak and tells you whether it can be repaired or the heater needs replacing. Same-day replacement is often possible.
Do this right now
- Turn it off. Electric: switch off its breaker. Gas: turn the gas control knob to Off.
- Close the cold water supply valve on the pipe that goes into the top of the tank.
- Move belongings away and catch the water with towels or a pan. If hot water is spraying or the tank is bulging, keep away and call.
Step-by-step help: water heater leaking: what to do right now.
Water heater leak: call now or can it wait?
Where the water comes from tells you how urgent it is. Use this check before you call.
- Call now
Water pooling from the bottom of the tank
Turn off the cold water supply and the power or gas, then call. A failing tank can get worse fast. - Call now
A leaking heater in the attic or an upstairs closet
The water will come through the ceiling below. Shut it off and call now. - Same day
A drip from the relief valve or a pipe on top
Often a valve or fitting. Close the cold supply and book a same-day visit. - Can wait
No hot water, but no leak
No flood risk. Check the breaker or pilot light, then book a regular visit.
Repair or replace: what the leak tells you
| Where the water comes from | Usual fix |
|---|---|
| Temperature and pressure (T&P) relief valve or its discharge pipe | Repair: replace the valve and check the water pressure and temperature setting |
| Drain valve at the bottom of the tank | Repair: tighten or replace the valve |
| Pipe connections or supply lines on top | Repair: tighten or replace the fittings or lines |
| The tank itself: rust, a wet seam, or water under the tank while the fittings are dry | Replace: a leaking tank cannot be repaired |
Age matters too. A tank water heater usually lasts 10 to 15 years (U.S. Department of Energy). If yours is near that age and needs a costly repair, replacing it is often the better value. The plumber can read the manufacture date from the label.
Is a leaking water heater dangerous?
It can be. Hot water can scald, water near an electric heater or outlets is a shock risk, and a leak on a gas heater can put out the burner flame. If you smell gas, leave the home and call 911 and Atlanta Gas Light at 877-427-4321 from outside. If the relief valve keeps releasing hot water or steam, the tank may be overheating: turn it off and call.
Is a leaking water heater an emergency?
Call right away if water is pooling, the tank itself is leaking, the relief valve keeps discharging, or the heater is in an attic or upstairs closet where a leak can come through a ceiling. A few drops from a fitting that stop after you close the cold supply can usually wait for a regular appointment, but do not leave the heater running unattended.
What the plumber does
- Makes the heater safe: power or gas off, water off.
- Finds where the leak starts and checks the tank’s age and condition.
- Checks the relief valve, water pressure and temperature setting.
- Explains repair or replacement, with the price of each, before starting.
- Repairs or installs the heater, reconnects water and power or gas, and tests for leaks and hot water.
Tank or tankless replacement?
| Tank | Tankless | |
|---|---|---|
| Upfront cost | Lower | Higher |
| Emergency install | Usually faster | May need gas line, venting or electrical upgrades |
| Hot water supply | Limited by tank size | Continuous while it runs |
| Typical life (DOE) | 10 to 15 years | About 20 years |
Can a water heater be replaced the same day?
Often, when a matching tank is available and nothing major has to change, such as the venting, gas line or space. A bigger change, like moving to a tankless model or a different fuel, usually takes longer to plan and install.
What changes the cost?
- Repair or full replacement
- Tank size and fuel: gas or electric
- Tank or tankless
- Where it sits: garage, closet, attic or crawl space
- Code updates, such as an expansion tank, drain pan or venting changes
- The time of the call (see how after-hours pricing works)
You get the price before work starts.
Does a new water heater need a permit?
Replacing a water heater commonly requires a plumbing permit and inspection, and local rules decide the details. The licensed plumber who installs it handles the permit for Augusta-Richmond County or Columbia County.
How to make your next water heater last longer
- Flush sediment from the tank once a year
- Test the T&P relief valve once a year
- Keep the temperature at a safe setting (many households use about 120°F)
- Install a drain pan if the heater sits in an attic or upstairs
Sources: U.S. Department of Energy, Energy Saver: Selecting a New Water Heater (tank 10 to 15 years, tankless about 20 years). Georgia 811, emergency gas contacts (Atlanta Gas Light).
