Start a new project. New to SRP's Plan Portal?We have been asked to make a decision if we want to install an irrigation system with 30 sprinkler heads now or not. Could you all provide some perspective? ARIZONA MUNICIPAL WATER USERS ASSOCIATION. 602-248-8482. ARIZONA LANDSCAPE CONTRACTORS ASSOCIATION. 480-296-2064. The Arizona Registrar of Contractors issues separate licenses for commercial and residential work, and dual licenses that cover both commercial and residential. Sellers are required to have obtained proper permits and have the irrigation system up to code requirements. Discover more answers. This classification allows the licensee to install, alter, and repair nonloadbearing concrete; uncovered patios, walkways,.