I’m having a hard time understanding the calculation of run time vs inches of water in the Flex Daily schedule. I would expect the zone run time X the Efficiency X the Nozzle Inches Per Hour = inches of Irrigation shown in the Soil Moisture graph.

For example I have a zone with the following advanced settings:

Efficiency = 70%

Nozzle Inches Per Hour = 1.5 inches/hr

According to the Soil Moisture graph, the Flex Schedule will add 0.48 inches each day it runs. And on those days, it runs that zone for 23 minutes. By my calculations that would only deliver 0.40 inches, which is about a 20% difference. It may not seem like a huge difference, but for zones with lower efficiency ratings, the difference is much larger. What am I doing wrong in my calculations?