Active leak
Your Water Heater Is Leaking
Shut the cold water supply valve at the top of the heater, then cut power at the breaker or turn the gas control to off. Once it is safe, where the water originates decides everything: fittings and valves are often repairable, but a leak from the tank body is not.
First: shut it down safely
- Close the cold water supply. There is a valve on the pipe entering the top of the heater. If it will not turn, use the main shut-off for the house — most Pflugerville homes have one near the meter at the street and often a second where the line enters the house.
- Cut the energy source. Electric: switch off the water heater breaker. Gas: turn the gas control knob to off.
- Do not drain the tank yet. Not until the power or gas is off. An electric element that runs dry fails within seconds.
- Photograph the damage before you clean up. If you end up making an insurance claim, the adjuster will want to see it as found.
If water has pooled around an electric unit and the breaker is not already off, do not wade in to reach it. Shut the circuit off at the panel instead.
Where is the leak actually coming from?
Check in this order — the first three are far better news than the fourth.
| Source | What it usually means |
|---|---|
| Inlet or outlet connections at the top | Fitting or connection issue. Often repairable. |
| Temperature and pressure relief valve | Failed valve, or excess pressure the valve is releasing correctly. |
| Drain valve at the bottom | Valve seal. Often repairable or replaceable. |
| Tank seam or base, no fitting above it | Corrosion through the tank. Not repairable. |
A useful test if you are unsure: dry the area completely and lay down paper towels. Condensation reappears as general dampness, usually in humid weather or after heavy hot water use. A leak reappears as a defined wet path from a specific point.
Why relief valves discharge
A relief valve releasing water is doing its job, and the question is why. Thermal expansion is a common cause — as water heats it expands, and on a closed system that pressure has nowhere to go without an expansion tank. That is why expansion tanks are a code item on replacement.
Whatever the cause, do not cap, plug, or block a discharging relief valve. It is the device that prevents the tank from becoming a pressure vessel failure.
Did a freeze cause this?
Possibly, and it is a specifically local pattern. Water heaters in unheated Pflugerville garages and attics have supply lines exposed to the cold, and Central Texas sees occasional hard freezes below 28°F. The February 2021 storm is the reference event here: Travis County was a designated disaster area under FEMA DR-4586, FEMA recorded roughly 1,500 assistance registrations in the 78660 area, and the city issued a boil-water notice after a power outage at the water plant. A line that froze and split will leak once it thaws, sometimes hours later — and an attic split drains through the ceiling rather than onto a garage floor.
What about insurance?
The distinction that matters: standard policies usually exclude the failed appliance itself as wear and tear, while often covering the resulting water damage under sudden-discharge provisions. Gradual leaks are frequently excluded.
We cannot tell you how your carrier will decide, and would not guess. What helps is photographing everything before cleanup, keeping the failed unit until the adjuster has seen or released it, and calling the carrier before authorizing repairs.
Common questions
How do I stop a leaking water heater?
Close the cold water shut-off valve on the pipe entering the top of the heater, then switch off the breaker for an electric unit or turn the gas control knob to off for a gas unit. If that valve will not close, use the main water shut-off for the house.
Is a leaking water heater an emergency?
A steady leak or standing water should be dealt with the same day — water damage compounds quickly and standing water near an electric unit is a hazard. A slow drip from a fitting is less urgent but still worth addressing before it becomes a rupture.
Can a leaking water heater be repaired?
It depends on the source. Leaks at the inlet and outlet connections, the drain valve, or the temperature and pressure relief valve are often repairable. Water coming from the tank body itself means the steel has corroded through, and that calls for replacement.
Why is water coming out of the pressure relief valve?
Either the valve has failed, or it is working correctly because pressure or temperature inside the tank is too high — often a thermal expansion issue, which is why expansion tanks are required on closed systems. Never cap or plug a discharging relief valve. That valve is what prevents a tank rupture.
Will insurance cover the water damage?
Damage from a sudden discharge is often covered, while damage from a gradual leak is frequently excluded, and the failed unit itself usually is not covered. Outcomes vary by policy and we cannot predict yours. Photograph everything before cleanup and contact your carrier before authorizing repairs.