Quote:
Originally Posted by retiredguy123
Not exactly. I water 30 minutes (3 zones: 5 minutes, + 5 minutes + 20 minutes) two times per week, and use 4,000 gallons of irrigation water per month. He waters 45 minutes (15 + 15 + 15) two times per week and uses 8,000 gallons per month. So, he is watering for more minutes, and is using 3,000 gallons of water more than I am. I doubt that he has a leak. I think he could save some water by reducing the watering times for the shrub areas because they shouldn't need as much water as the grass.
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I just looked at my timer: 60 minutes per run (five zones rather than three), two runs per week and I use approx. 6,000 gals per month.
30 mins -> 4,000 gals -> 133 gals/minute avg over all runs
45 mins -> 8,000 gals -> 178 gals/minute avg over all runs
60 mins -> 6,000 gals -> 100 gals/minute avg over all run
Mine is likely lower due to fewer heads in each zone; I have long, narrow lawn areas requiring more zones but fewer heads.
If the 45 minutes and two times per week is accurate (no extra watering for new sod, no extra watering for high temps) then 178 does seems high.
Another thing to look for would be a missing/broken head. A geyser in the lawn could account for a bit of extra water.