If my basement flooded, do I need to replace my water heater?
The Gas Appliance Manufacturers Association (GAMA) has determined that any gas appliance exposed to flooding should be replaced. In a press release, GAMA advised against do-it-yourself repairs:

“With heavy rains bringing the possibility of severe flooding, it is important to remember that all flood-damaged plumbing, heating, cooling and electrical appliances and related systems should be replaced, rather than repaired... (GAMA) stresses that the repair of flooded appliances and related systems (including damaged venting and electrical connections) is not a job for the do-it-yourselfer, no matter how skilled. This is particularly true of control valves, according to the GAMA official. These components are manufactured to extremely close tolerances. Once submerged in floodwaters, they must be replaced. Field repairs should never be attempted by the homeowner.”
(taken from www.gamanet.org)

Potential damage to controls on oil, gas and electric water heaters present an increased risk factor to the homeowner. This damage may be visible, but can also be hidden behind a cover or jacket. Exposure to flooding conditions can cause corrosion of controls and components, a build-up of dirt/debris or a short circuit situation. Even though appliances exposed to flooding may appear to be operational, the gradual buildup of dirt and corrosion over time can render safety devices inoperative.