Use: The 100112328 gas water heater thermopile assembly can perfectly compatible with Reliance, Whirlpool, A.O.Smith, Kenmore, State, American Water Heater. Replacement old A.O.Smith # 6911197, 9007872005, 100094024. Not for use on Reliance C3 FAIR and C3 FVIR heaters. Note: When ordering the parts, please verify your part number is correct for your model before ordering. Parts may look the same but the size and shape can have small variations. The How-To Steps: 1. Shut off the gas supply. 2. Unhook everything from the gas valve. 3. Remove the burner assembly. 4. Remove the thermocouple from the pilot assembly. 5. Install the new thermocouple. 6. Put everything back into its place. 7. Turn on gas supply and check for leaks. It only takes 15-30 minutes to easily complete the replacement operation. Save your time and money. Ganivsor 100112328 Thermopile Assembly 21" for Reliance, Whirlpool, A.O.Smith, Kenmore, State, American Water Heater, Compatible with Gas Water Heater, 750 Millivolt Thermopile Replacement Kit