Water Heater Leaking
Where the water comes from decides the fix. Leaks from pipe connections, the drain valve or the temperature-pressure relief valve are usually repairable; typical water heater repairs cost about $228–$1,017. Water seeping from the tank itself means the tank has failed and needs replacing, typically $882–$1,826 for a tank heater.
Last reviewed September 2026
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Where does the water first appear?
Dry the area and watch: top pipe fittings, the relief valve pipe, the drain valve near the bottom, or the tank itself.
Signs it's this problem
- A puddle or damp floor around the base of the water heater
- Drips from the pipe connections on top of the heater
- Water coming from the discharge pipe on the side (relief valve)
- Rust streaks or water seeping from the bottom of the tank
Why it happens
Fittings loosen with heat cycles, the drain valve can drip after flushing, and the relief valve opens when pressure or temperature is too high. Inside the tank, sediment and corrosion eventually eat through the steel lining, and a rusted-through tank can't be repaired.
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Safety: Turn off the electricity at the breaker (electric) or set the gas valve to off or pilot (gas) before working on the heater. The water inside can scald.
Water Heater Leaking cost
| Job | Typical cost |
|---|---|
| Typical water heater repair (average about $615) | $228–$1,017 |
| Replace a tank water heater | $882–$1,826 |
| Replace a 50-gallon gas tank heater | $1,600–$2,800 |
Got a quote? Check if it's fair
Typical professional price for this job: $228–$1,017
Common questions
Can a leaking water heater tank be repaired?
No. Once the steel tank corrodes through, it must be replaced. Leaks from valves and fittings, however, are usually simple repairs.
Is a leaking water heater dangerous?
It can cause water damage and, rarely, a sudden failure. A relief valve that keeps releasing water is a warning sign of excess pressure or temperature and should be checked promptly.