Flooded? Next Steps for Water Heater …

After a flood, replacing a water heater is critical for safety, performance, and long-term reliability. Floodwaters often contain bacteria, chemicals, and sediment that can infiltrate the water heater’s tank and internal components. Even if the unit appears to work afterward, contamination can compromise water quality, posing health risks to your household.

Electrical components such as thermostats, heating elements, igniters, and gas valves are highly susceptible to water damage. Moisture can cause corrosion, short circuits, and unsafe operation, potentially leading to electrical shock or gas leaks. Gas-fired models face added risks if floodwater has damaged the burner assembly, flue, or safety controls.

Flood exposure can also accelerate rust and weaken the tank’s structural integrity. Once corrosion begins inside the sealed tank, it cannot be repaired and can lead to leaks or catastrophic failure. Manufacturers and plumbing codes typically recommend full replacement after submersion, as warranties and safety certifications are voided once floodwater has entered the unit.

Replacing the water heater ensures your home has a safe, reliable, and sanitary hot water supply. While it may seem costly up front, it prevents hidden damage from causing dangerous failures later, protecting both your property and your family’s health.