MP Rotator nozzles have a lower precipitation rate than typical spray nozzles, so your run times may need to be lengthened compared to traditional sprays. Run times with the MP Rotator Nozzle should be two to three times longer than a standard spray zone since the MP Rotator Nozzle puts water down at a slower rate. This results in a significant reduction in the runoff, saving large amounts of water.
The following performance data charts show the difference in application rates for MP Rotator Standard Nozzles vs. Spray Nozzles at 40 PSI (2.8 bar; 280 kPa). Even with run times that are three times longer, you'll still use about 30% less water with MP Rotator Nozzles. For heavier water application, the MP800 Nozzle Family offers a 0.8 in/hr (20 mm/hr) matched precipitation rate, so run times are generally twice as long.
If you need additional help determining your run times, Hunter offers a Run Time Calculator. The calculator is a free, online tool that generates a peak-season run time schedule for each program and station in your system. The calculator factors in historical ET (evapotranspiration) data for your region and your irrigation system set up to determine the schedule.
It's important to remember the generated run time schedule is based on your area's hottest month. You'll need to adjust water usage as temperatures cool and heat up. You can either do this manually, through your seasonal adjustment feature on your controller (select models only), or through a weather sensor, such as the Solar Sync®.
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