Shutting down a leaking tank
Hot water can scald. Keep children away and do not touch the tank or drain valve if the water is very hot.
- Close the cold supply.The cold-water line usually enters the top of the tank and has its own valve. Close it to stop the tank refilling.
- Turn off the heat source.On a gas heater, turn the control knob to off or pilot. On an electric heater, switch off its breaker at the panel.
- Contain the water.Put towels or a shallow pan down and move stored items away. If the heater is in a garage, sweep water toward the door or a drain.
- Wait before draining.If a plumber is coming soon, leave draining to them. Draining a very hot tank through a garden hose can burn you or damage the hose.
Where the water is coming from
| Source | What you see | Usually means |
|---|---|---|
| Bottom of the tank | Water pooling under the heater, rust streaks | The tank has corroded through and needs replacement |
| Temperature and pressure relief valve | Water from the discharge pipe on the side | Too much pressure or heat, or a worn valve; needs a plumber to check |
| Top connections | Drips at the inlet or outlet fittings | A loose or corroded fitting that can often be repaired |
| Drain valve | Drip from the spigot near the bottom | A worn drain valve, often a simple fix |
| Condensation | Light moisture after a cold-water refill | Often normal and goes away once the tank heats |
Why tanks fail in La Habra
La Habra's water is hard, a blend of local groundwater and imported water. Minerals settle in the bottom of a tank as sediment, which can make the heater rumble or pop and can shorten the life of the tank. Many households never flush their heaters, which makes the buildup worse.
The anode rod inside the tank protects the steel from corrosion until it wears out. Once it is gone, the tank lining can rust through. A leak from the body of the tank is the usual end point.
Replacement points to know in California
- Seismic strapping
- California requires water heaters to be strapped to resist earthquakes. A replacement should include proper straps.
- Permits
- Water heater replacement may need a city permit and inspection. Check with the city.
- Gas connection
- The gas line and venting must be connected correctly. Ask how the plumber will test for leaks.
- License
- Check the installer's CSLB license at cslb.ca.gov.
Repair versus replace
Often repairable
- Leaking drain valve
- Loose top fittings
- Worn relief valve
- Failed thermostat or igniter
Usually replace
- Water leaking from the tank body
- Heavy rust at the base
- Repeated failures on an older unit
- A tank that cannot be safely strapped or vented
Common questions
Can I keep using hot water if the leak is small?
If the tank itself is leaking, it is safer to shut it down. A leak from a fitting or drain valve may be manageable for a short time, but have it checked promptly.
Should I switch to a tankless water heater?
That is a separate decision with gas line, venting and electrical considerations. In an emergency, you can ask for a like-for-like replacement now and discuss tankless later.
Does a new water heater need strapping?
Yes. California requires water heaters to be seismically strapped.
General information for La Habra, not a quote or professional advice. In an emergency, call 911.