Need t173 part for intermatic hot water heater timer This looks like what I have for my hot water heater timer. However, the model number is T173.

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Open following link for T100 series parts:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
The T173 timer is 120Volts and wires same as T103.
Only difference between T173 and T103, is the T173 has day-skipper wheel
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
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