drip irrigation

know of any good sites to find information of how to install a residential lawn irrigation system? I am particularly concerned with how to connect to the water supply of my house. Do I need a back-flow preventer? must it be connected beneath grade? located in Denver, CO

I recently installed an irragation system in my yard. I went to the rainbird website www.rainbird.com (http://www.rainbird.com) and downloaded the info to get a free computer design for my yard as well as a shopping list of all components needed. Good luck