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Sprinkler System Operations Donna Pacetti, Irrigation Specialist, Denver Water   Practicing the following guidelines can decrease water use by up to 30% over the watering season.  Spring Wait to activate your sprinkler system as late into the season as possible depending on the weather.  May is usually a good time to start up your system.  Starting later encourages grass roots to seek water and grow deeper.  When hot, dry summer days arrive, the deeper root system means the grass can go longer between waterings.              When you start up your system, go through each zone to check for problems and make repairs.  Be sure to check for any leaks in the system, especially at the backflow preventer and in the valve boxes.  This is the time to adjust all the heads to ensure the water is being applied to the correct areas.  Set the controller to water only half the amount your landscape will typically need in July.  Consider decreasing the number of days in half and not the time per zone. Summer Minimize evaporation by watering in the early morning when there's less wind.  Check out the system once a week to observe how well it's working.  Manually run the controller through each zone to check for leaks and make sure water is being applied properly.   • Xeriscape Colorado Home • What Is Xeriscape? • Demo Gardens   • Upcoming Events • Resources & Reference • Articles