More information. So I set the pressurized timer for longer this time (7min), and got some really inconsistent results. I watched the monitor as it calibrated it and it would jump from 15 down to 6 and back up to 11 and so on until it landed on 11.8gpm. Is this expected?
Also, I haven’t seen this with my other 2 grass zones. It’s only the front yard zone. Maybe because it’s closest to the valves and where the main water comes in?