OK here is situation. Suppose my daughter turns off water into house but leaves the gas water heater on. Then if she develops a hot water pipe leak in the house on the exit side of the gas water heater and all water drains out of water heater, wouldn't this cause a fire as gas heater tries to heat empty tank. Remember she knows how to turn off in coming water but she does not know how to shut off and later turn on gas water heater. There is no setting such as Vacation or Pilot only on the water heater.
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Ray
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