Before you fire up your irrigation system for the season, have a licensed irrigator examine it for leaks and other maintenance issues.
To upgrade the performance of your system and to save water, consider some of these changes and modifications:
Convert shrub areas to high performance drip irrigation. Properly installed inline drip tubing can save water and give a higher level of water distribution uniformity.
Install a Rain and Freeze sensor. This will shut down your irrigation system during a rain or freeze event.
Upgrade to an E/T "Smart Controller". These controllers can adjust watering based on current weather conditions and save water.