You can select interval watering from 1 to 31 days.
1
When in the Water Days mode, press the 
button until the cursor is over INT. Press the 
button and the interval watering icon 
will be displayed and a 1 will be flashing.
2
Press the or 
button to select the number of days between watering days (1 to 31 days). This is called the interval.
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