High efficiency nozzles have lower flow rates and apply water at lower application rates to reduce runoff in comparison to conventional spray nozzles. High efficiency nozzles typically improve efficiency by 10 to 20 percent.
To find out how much water your landscaping requires, check out our handy drought irrigation guide here. And to find out if your water agency offers rebates on irrigation upgrades, visit rebates page here.
Source: Lush & Efficient