We have a great “Water it Wisely” website in Phoenix that guides us to how long to run a zone, and how often, given a GPH flow rate. It’s what I used to determine my run time.
After that I set a PR in in/hr to get the run time that I wanted, then back calculated the area based on my previous post description in this thread. My thought was if this manual approach I used could be automated it might solve the problem that you’ve noted. Something like the “Water it Wisely” algorithm of determining run time based on GPH instead could be used instead of the existing in/hr metric would eliminate the need to enter area for single point drip zones. The Rachio guys would need to determine applicability to other climates, then find a way to apply the ET changed throughout a season. It’s not a slam dunk and would require some work but the concept is there.
