Water heater tank has failed and is flooding the area

Symptoms

• Large amount of water suddenly pouring or spraying from the tank
• Water spreading quickly across the floor
• Tank may look visibly bulged, split, or have a large hole
• Old tank, often at or beyond typical lifespan

Likely causes

• CommonSudden rupture of a severely corroded tank wallYears of internal corrosion can weaken the tank until it finally gives way, sometimes suddenly rather than as a slow leak.
• PossibleCatastrophic failure of a fitting or the tank seam under normal pressureA long-degraded weld or seam can fail abruptly.
• PossibleExcess pressure from a malfunctioning T&P valve or expansion issue compounding an already weak tankCombined stress can push a weakened tank past its failure point.

What to do

1. Turn off the cold water supply valve at the top of the tank immediately to stop the flow.
2. Turn off power at the breaker (electric) or turn the gas control to off (gas) as soon as it's safe to reach.
3. If the area around the tank is unsafe due to standing water near electrical outlets or panels, prioritize getting people clear before further action.
4. Move any items that could be damaged by water away from the flooded area if it's safe to do so.
5. Document the damage with photos for insurance purposes once the immediate water flow is stopped.
6. Do not attempt to plug or patch the tank; a ruptured tank needs full replacement, not a temporary fix.

Tools and parts

• None; prioritize shutting off water and power/gas

When to call a pro

Call a plumber immediately to remove the failed tank and install a replacement, and consider a water damage restoration service if flooding was significant.

Safety