A gas water heater pilot light is designed to stay lit continuously 24 hours a day, 365 days a year whenever the water heater is in active service. It only shuts off if forcefully blown out by a draft, smothered by poor combustion air, extinguished by a temporary gas supply interruption, or shut down manually by the homeowner during maintenance or extended vacations. Verification: Check the pilot sight glass periodically to confirm the flame remains burning steadily.
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