For HUNTER heads...
Nozzles | Hunter Industries
Pro heads have a different inches per hour depending on the distance (radius) water is sprayed.
https://www.hunterindustries.com/sit...Nozzles-US.pdf
MP rotators come in 2 variants. MP is 0.4in/hr and MP800 is 0.8 in/hr.
Wonder which one Dean's is referencing.
Both water delivery rates vary slightly based upon water pressure.
With the ponds so low, homes using that irrigation water will also be pushing a lot of grit, sand, and biomass into their sprinkler heads. Highly recommend turning on the system and inspect each head to see if it it spraying properly, if at all. There should be a filter screen on every head, but most houses seem to not have them. So instead of cleaning a filter, you get to replace the head.