Hunter Pro 8 FIXED (not adjustable, you can’t adjust the spray pattern, correct?)?
Unless you go do a catch cup test, you don’t have the EXACT precipitation rate, but you can use the Hunter specs to dial it in pretty close. Chances are your sprinklers are on full water pressure, and probably higher than 30psi, unless you have a pressure reducing devise, or pressure reducing sprinkler bodies, but we will assume 30psi since you mentioned that. I like to average out between square and triangle, so you are looking at 1.57"/hr. This is the figure you would want to enter into the advances section of each zone in the “Nozzle Inches Per Hour”. And yes, your grass zones will most likely not water for 3-5 days depending on local temps/weather.
If you have the newer MP800’s (different than the “standard” MP Rotators), they put down a lot more water than the standard ones, almost double. Confirm which ones you have, as I believe the MP800’s are really new.
Personally, I HATE adjustable emitters. You really have no idea what type of precipitation you are putting out, so you don’t really know what to tell Rachio…If you are intent on keeping them, we will need to do some testing to see what kind of water they are putting out. If you are willing to switch over to some fixed 2gph emitter, it will simplify things a ton…
The micro sprays are fixed, so those can easily be accounted for. Could all the flower beds be converted to those?