Water heater timer for conventional gas water heater/
Step 1: Timer turns motor on for 20 seconds > motor rotates gears > largest gear has metal shaft (marked with red line) > this shaft will fit over gas valve on water heater
Note gas valve can be set to 'vacation' > vacation will stop water from being heated throughout day when nobody is home > and again at night when people are sleeping
The stem has a hex bolt and a 'key' sticking out [at 3:30 position]
Gear motor will be controlled by a wall-mounted timer. When gear motor is turned on, water heater is set to vacation > this will save energy when nobody needs hot water
When gear motor is turned on again, water heater is set to thermostatic setting > water resumes heating again
