Quote Originally Posted by kevinpate View Post
You have ruled out leaks. You don't suggest your use includes lengthy daily or more frequent showers as a norm in a multi-person household. 5 zones at 20 minutes each is 1.5 hours, thrice weekly, for a total of 4.5 hours of watering. That's a lot of watering, or seems to be to me anyway.
Kevin
Your math is off.
3 times/week times 5 zones = 15 zones/week
15 zones times 20 minutes = 300 minutes/week (5 hours)
300 minutes/week times 4.33 weeks/month = 1300 minutes/month
1300 minutes/month times 10 gallon/minute flow rate = 13,000 gallon/month (estimated flow rate)
13,000 plus domestic needs = large water bill