Ok, I reran all the zones in calibration using 2 minutes instead of 1 minute. Although visually I couldn’t see a difference in the strength of flow from the sprinkler heads there was a significant difference in the calibrated value. ALL of my 8 zones registered higher flow rates. In all it was an increase of 3.5%, 5%, 6%, 6%, 6%, 7%, 9%, and 9.5%. You can see with these higher values I was in several cases very, very close to the +10% warning margin the system defaults to when nothing was actually wrong at all. With these new higher values I’ve once again lowered my alert values to 110% of calibrated flow and hopefully the problem is resolved.
I HIGHLY RECOMMEND when calibrating the Rachio Wireless Flow Meter using more than the default 1 min calibration per zone even if it seems the zone is visually up to pressure in that first minute. Perhaps my system is odd but I’d also encourage Rachio to change the default duration of the calibration to at least 2 minutes per zone to save on folks having these same warnings without perhaps understanding why it is happening and thinking it is actually a serious problem.
Thanks!