Conducted annual maintenance on 6-year-old water heater in Alpharetta residence. Drained and flushed tank completely—observed moderate sediment discharge. Inspected anode rod (approximately 40% deteriorated) and recommended replacement within next 12 months. Checked T&P valve functionality—operating correctly. Confirmed gas valve and thermocouple in good working order. Cleaned burner assembly and verified proper flame pattern. Unit is performing efficiently. Provided customer with maintenance schedule documentation for future reference.