After replacing the heads in Zone 4 and Zone 6 (and finding and fixing multiple leaks), we wanted to see what effect it had our water usage.
We have checked our water usage before, in July 2014, October 2017, July 2020, and July 2022. This time, we simply read the water meter on Tuesday night, before it went off, and then again on Wednesday morning after it had run it's normal cycle.
It used 1462 gallons.